Hat in time's page implies 3D platformers of ALL kinds are no longer made before it specifies what kind and this irks me
Still, why did that sort of game vanish for the most part? A lot of simple to make types of game have vanished and there are too few 3D platformers. What happened to fun, simple games?
The general climate for that type of stuff has changed. Platformers only really work on a 2D plane, it complicates it when you have to forcefully check your level for glitches and skips, and nowadays, you have to guide the player without making them feel stupid.
Crash Bandicoot was a way of making a platformer 2D while looking 3D. The first try at one. The recent Nsane trilogy wasnt a good idea. Modernization has made it so its economic to have a spheroid for a hitbox, the takeaway is you can now slide off edges. Platformers have also died out for various reasons, such as modern "gamers" who only play COD wanting there to be atleast some violence or grittiness in everything. Theres also a push for more mature games to become child friendly, as shown by terraria"s community getting trashed by youtubers and the moderators banning people for including swear words in images, even unintentionally.
So, as a game developer, you're stuck inbetween two rocks and a gun. The rocks are children and the "gamer" community, and the gun is the media and minority force representation. People will hate your game for making a simple, child friendly platformer if it holds your hand, which is the right thing to do to some extent. If you make a platformer where say, you use guns to kill a boss and there's blood, the press will say it creates honor students or something else insane. This adds two metal sheets between the rocks. The last thing is that people don't want 3D platformers because of the history of them, which adds an assault rifle if the gun doesnt.kill you first.