Yeah, indies are thankfully still covering 2D games, and there has been somewhat of a rebound in general, where e.g. Nintendo will also publish 2.5D versions of some of their games.

It just always felt weird that AAA studios treated 3D as mandatory, in the name of profit in particular, despite it locking out customers.
Well, kind of the obvious thing happened: Mobile games. Often fiercely 2D. Often controllable with one finger. And of course, obscenely profitable.