There is a CESA report from 2018 showing digital only accounted for around 18% of software sales, so I'm interested to see what software sales for physical PS4 titles were at around that time or even going back to 2016, to see if the physical drop-off is actually as bad as people try to claim.
Even if it is, as you said digital might account for a much larger part of the software sales, particularly on PS5.
Actually, here are some Media Create sales data from May 2016, pulled from NeoGAF:
View attachment 1333
Notice anything? Most of the Top 10 are below 10K in software sales; comparatively, ALL of the Top 10 in the Famitsu chart for this month are above 10K, and they all mostly happen to be Nintendo games.
I genuinely think the software phenomenon we're seeing with the Switch in Japan is specifically unique to that system and only really benefiting Nintendo's own 1P software because it looks like Top 10s back 2016 (as one example) were generally filled with games pushing under 10K but still managed to chart.
You need compare Golden Weeks… it is 2 weeks data with one of them being a holiday.
Golden Week 2016
Famitsu Sales: Week 19, 2016 (May 02 - May 08)
01./01. [3DS] Kirby: Planet Robobot <ACT> (Nintendo) {2016.04.28} (¥4.700) - 82.919 / 236.797 <60-80%>
(-46%)
02./05. [3DS] Yo-Kai Sangokushi <SLG> (Level 5) {2016.04.02} (¥4.600) - 29.244 / 496.575 <80-100%>
(-3%)
03./02. [PS4] Jikkyou Powerful Pro Baseball 2016 <SPT> (Konami) {2016.04.28} (¥7.980) - 25.198 / 100.703 <80-100%>
(-67%)
04./03. [PSV] Jikkyou Powerful Pro Baseball 2016 <SPT> (Konami) {2016.04.28} (¥6.980) - 23.586 / 90.247 <80-100%>
(-65%)
05./04. [PS3] Jikkyou Powerful Pro Baseball 2016 <SPT> (Konami) {2016.04.28} (¥6.980) - 13.453 / 59.767 <80-100%>
(-71%)
06./07. [3DS] Dragon Quest Monsters: Joker 3 <RPG> (Square Enix) {2016.03.24} (¥5.250) - 11.195 / 590.987 <80-100%>
(-11%)
07./10. [WIU] Super Mario Maker # <ACT> (Nintendo) {2015.09.10} (¥5.700) - 9.108 / 885.714 <80-100%>
(+4%)
08./12. [WIU] Splatoon # <ACT> (Nintendo) {2015.05.28} (¥5.700) - 8.738 / 1.299.865 <80-100%>
(+13%)
09./13. [PSV] Minecraft: PlayStation Vita Edition <ADV> (Sony Computer Entertainment) {2015.03.19} (¥2.400) - 8.675 / 682.385 <80-100%>
(+17%)
10./19. [3DS] Animal Crossing: New Leaf [Nintendo Selects] <ETC> (Nintendo) {2016.03.17} (¥2.700) - 6.494 / 43.773 <60-80%>
(+34%)
11./09. [PSV] One Piece: Burning Blood # <FTG> (Bandai Namco Games) {2016.04.21} (¥6.800) - 5.897 / 44.236 <60-80%>
(-38%)
12./22. [3DS] Mario & Sonic at the Rio 2016 Olympic Games <SPT> (Nintendo) {2016.02.18} (¥4.700) - 5.657 / 162.465 <80-100%>
(+34%)
13./14. [WIU] Star Fox Zero + Star Fox Guard Double Pack <Star Fox Zero \ Star Fox Guard> <STG> (Nintendo) {2016.04.21} (¥6.500) - 5.577 / 29.684 <40-60%>
(-21%)
14./17. [3DS] Disney Art Academy <HOB> (Nintendo) {2016.04.07} (¥3.700) - 5.384 / 42.304 <60-80%>
(+11%)
15./08. [PS4] One Piece: Burning Blood # <FTG> (Bandai Namco Games) {2016.04.21} (¥7.600) - 5.292 / 46.601 <60-80%>
(-48%)
16./06. [PS3] Star Ocean: Integrity and Faithlessness <RPG> (Square Enix) {2016.04.28} (¥7.980) - 4.977 / 25.050 <40-60%>
(-75%)
17./27. [3DS] Tomodachi Life [Nintendo Selects] <ETC> (Nintendo) {2016.03.17} (¥2.700) - 4.118 / 26.684 <40-60%>
(+37%)
18./15. [PS4] Dark Souls III <RPG> (From Software) {2016.03.24} (¥7.430) - 3.894 / 303.789 <80-100%>
(-38%)
19./20. [3DS] Terraria <ADV> (Spike Chunsoft) {2016.04.21} (¥3.800) - 3.844 / 14.771 <60-80%>
(-19%)
20./00. [3DS] Pokemon Red / Green / Blue / Yellow _3DS Virtual Console Version_ |DL| (Dedicated Download Card Special) <RPG> (Pokemon Co.) {2016.02.27} (¥1.389) - 3.670 / 154.734 <80-100%>
21./28. [WIU] Pokken Tournament # <FTG> (Pokemon Co.) {2016.03.18} (¥7.200) - 3.589 / 140.849 <80-100%>
(+26%)
22./00. [3DS] Mario Kart 7 <RCE> (Nintendo) {2011.12.01} (¥4.571) - 3.545 / 2.545.492 <80-100%>
23./25. [PS4] UEFA EURO 2016: Winning Eleven 2016 <SPT> (Konami) {2016.04.21} (¥3.800) - 3.157 / 11.317 <60-80%>
(-8%)
24./30. [3DS] Ansatsu Kyoushitsu: Assassin Ikusei Keikaku!! <ACT> (Bandai Namco Games) {2016.03.24} (¥5.700) - 2.852 / 44.552 <80-100%>
(+14%)
25./00. [3DS] Pokemon Omega Ruby / Alpha Sapphire # <RPG> (Pokemon Co.) {2014.11.21} (¥4.571) - 2.817 / 2.983.204 <80-100%>
(+13%)
26./21. [WIU] Star Fox Zero <STG> (Nintendo) {2016.04.21} (¥5.700) - 2.750 / 15.439 <40-60%>
(-39%)
27./00. [PS4] Minecraft: PlayStation 4 Edition <ADV> (Sony Computer Entertainment) {2015.12.03} (¥2.400) - 2.735 / 78.675 <80-100%>
28./24. [PS4] Far Cry Primal <ADV> (Ubisoft) {2016.04.07} (¥8.400) - 2.582 / 51.450 <80-100%>
(-29%)
29./00. [3DS] Yo-Kai Watch Busters: Red Cat Team / White Dog Squad <ACT> (Level 5) {2015.07.11} (¥4.600) - 2.540 / 2.142.387 <80-100%>
30./00. [WIU] Mario Kart 8 # <RCE> (Nintendo) {2014.05.29} (¥5.700) - 2.488 / 1.214.012 <80-100%>
2018 Golden Week
Famitsu Sales: Week 18, 2018 (Apr 30 - May 06)
01./00. [NSW] Donkey Kong Country: Tropical Freeze <ACT> (Nintendo) {2018.05.03} (¥5.980) - 96.754 / NEW <60-80%>
02./01. [PS4] Jikkyou Powerful Pro Baseball 2018 <SPT> (Konami) {2018.04.26} (¥7.980) - 37.818 / 171.373 <60-80%>
(-72%)
03./06. [NSW] Splatoon 2 # <ACT> (Nintendo) {2017.07.21} (¥5.980) - 31.073 / 2.272.180 <80-100%>
(+73%)
04./07. [NSW] Kirby Star Allies <ACT> (Nintendo) {2018.03.16} (¥5.980) - 27.430 / 488.124 <80-100%>
(+77%)
05./05. [NSW] Nintendo Labo Toy-Con 01: Variety Kit <EDU> (Nintendo) {2018.04.20} (¥6.980) - 26.334 / 140.768 <40-60%>
(+24%)
06./09. [NSW] Mario Kart 8 Deluxe <RCE> (Nintendo) {2017.04.28} (¥5.980) - 24.997 / 1.477.191 <80-100%>
(+96%)
07./02. [PSV] Jikkyou Powerful Pro Baseball 2018 <SPT> (Konami) {2018.04.26} (¥6.980) - 17.959 / 76.170 <60-80%>
(-69%)
08./14. [NSW] Super Mario Odyssey # <ACT> (Nintendo) {2017.10.27} (¥5.980) - 16.078 / 1.671.676 <80-100%>
(+78%)
09./13. [NSW] The Snack World: TreJarers Gold <RPG> (Level 5) {2018.04.12} (¥5.980) - 12.804 / 75.606 <80-100%>
(+25%)
10./15. [NSW] The Legend of Zelda: Breath of the Wild # <ADV> (Nintendo) {2017.03.03} (¥6.980) - 12.662 / 925.276 <80-100%>
(+52%)
11./04. [PS4] God of War # <ACT> (Sony Interactive Entertainment) {2018.04.20} (¥6.900) - 12.243 / 84.936 <80-100%>
(-45%)
12./22. [3DS] Pokemon Ultra Sun / Ultra Moon # <RPG> (Pokemon Co.) {2017.11.17} (¥4.980) - 5.783 / 2.222.013 <80-100%>
(+82%)
13./26. [NSW] 1-2-Switch <ETC> (Nintendo) {2017.03.03} (¥4.980) - 5.462 / 384.383 <80-100%>
(+95%)
14./17. [NSW] Nintendo Labo Toy-Con 02: Robot Kit <EDU> (Nintendo) {2018.04.20} (¥7.980) - 4.978 / 36.922 <20-40%>
(+16%)
15./29. [NSW] Arms <FTG> (Nintendo) {2017.06.16} (¥5.980) - 4.543 / 366.692 <80-100%>
(+120%)
16./24. [3DS] Detective Pikachu <ADV> (Pokemon Co.) {2018.03.23} (¥4.980) - 4.468 / 74.740 <60-80%>
(+54%)
17./12. [NSW] SD Gundam G Generation: Genesis for Nintendo Switch <SLG> (Bandai Namco Games) {2018.04.26} (¥6.800) - 4.372 / 15.445 <40-60%>
(-61%)
18./19. [PS4] Far Cry 5 <ACT> (Ubisoft) {2018.03.29} (¥8.400) - 4.023 / 138.260 <80-100%>
(-3%)
19./00. [NSW] Pokken Tournament DX <FTG> (Pokemon Co.) {2017.09.22} (¥5.980) - 3.937 / 245.763 <80-100%>
(+108%)
20./16. [NSW] Naruto Shippuden: Ultimate Ninja Storm Legacy for Nintendo Switch <Naruto: Ultimate Ninja Storm \ Naruto Shippuden: Ultimate Ninja Storm 2 \ Naruto Shippuden: Ultimate Ninja Storm 3> <FTG> (Bandai Namco Games) {2018.04.26} (¥6.800) - 3.773 / 9.854 <40-60%>
(-38%)
21./00. [NSW] Dragon Ball: Xenoverse 2 for Nintendo Switch <FTG> (Bandai Namco Games) {2017.09.07} (¥6.800) - 3.561 / 151.571 <80-100%>
(+101%)
22./20. [PS4] Cities: Skylines - PlayStation 4 Edition <SLG> (Spike Chunsoft) {2018.04.12} (¥5.400) - 3.392 / 23.804 <60-80%>
(-14%)
23./27. [PS4] Tom Clancy's Rainbow Six: Siege - Advanced Edition <ACT> (Ubisoft) {2018.03.01} (¥6.000) - 3.156 / 41.807 <80-100%>
(+14%)
24./23. [PS4] Monster Hunter: World # <ACT> (Capcom) {2018.01.26} (¥8.980) - 3.073 / 1.941.257 <80-100%>
(+2%)
25./00. [NSW] Attack on Titan 2 # <ACT> (Koei Tecmo) {2018.03.15} (¥7.800) - 3.063 / 55.878 <80-100%>
(+61%)
26./03. [PS4] Utawarerumono: Chiriyukusha e no Komoriuta # <SLG> (Aqua Plus) {2018.04.26} (¥6.800) - 2.845 / 25.662 <60-80%>
(-88%)
27./00. [3DS] Mario Party: The Top 100 <ETC> (Nintendo) {2017.12.28} (¥4.980) - 2.557 / 191.785 <80-100%>
28./00. [3DS] Animal Crossing: New Leaf - Welcome amiibo <ETC> (Nintendo) {2016.11.23} (¥2.700) - 2.427 / 365.692 <80-100%>
29./00. [NSW] FIFA 18 <SPT> (Electronic Arts) {2017.09.29} (¥5.800) - 2.346 / 97.007 <80-100%>
30./00. [NSW] Mario + Rabbids: Kingdom Battle <SLG> (Nintendo) {2018.01.18} (¥5.980) - 2.195 / 195.197 <80-100%>