>>56047988Greed.
GF was content with the release schedule and by the end, could put out sequels instead of a rehashed game following the same plot.
However, the jump to 3D meant more time spent making the game. Those release windows the 2D games had were too strict, which meant that they had to cut features to makes ends meet.
The shining example of this, is the Alola games.
SM felt unfinished and was essentially the beta for USUM which, while it felt complete, it was also a shitty game.
The games are only getting bigger, so I expect more technical issues like in SV.