Because people dont realize most games are made on just a handful of engines, and they are not kind to photorealism.

That isnt 1990s. Lol

It doesn't matter though, literally every phone is limited in a matter that makes whatever fastest speed irrelevant. Its like going from dialup to 1gig fiber. The leap is so much you don't even notice things being slow anyways, so if offered 2gig you wouldn't even consider it.