Its not just AC, Mario Odyssey got the Luigi ballon thing as free DLC and then no expansion/paid DLC at all, Mario Party and Mario sports got barely anything ( and all was planned before launch.) Splatoon 2 got 1 season and a horde mode, literally the same as Arms, Swit h Sports, which has sold arou d 20 million copies got one additional sport that was announced before launch (shhh they couldn't finish it in time shhh) and then no DLC courses. Smash got two seasons spread over three years and Mario Kart only got its third season after 5 years of multi-million dollar quarters.Its weird that Nintendo cut support for AC so soon considering it sold 45 million
Nintendo just doesn’t want to do GaaS, even when the users want them to.