The average Joe will see the drop in quality of PS Studio games and decide that maybe he shouldn't buy their games day 1 anymore, like he did the past few years. Maybe he will notice that the type of games he used to love on PlayStation, haven't been as frequent as previously.
So the average Joe might want to look for alternatives and might spend less and less time and money on PlayStation.
You really think they will? What about the next generation (if there is any for Xbox), when people will look back and see 0 reasons to buy another Xbox?
Are you an average Joe? If your are here and engage in discussion of course you are not, gaming wise. Do you think that kind of gamer looks at "the drop in quality of PS Studio games"?
They buy FIFA/Madden/2K COD, GTA and MTX on F2P games. And buy Playstation out of habit, because the next one has a higher number and they got used to the controller. That's all they need to know.
That group comprises 70% of PS/XBOX userbase and generate the most $$$ for them. The other 30 may whine. Within that subgroup, a third at most might migrate to PC.