>>178697012It's probably because the majority of these are from fighting games, which apart from the fighters and the stage backgrounds didn't really have much else to worry about. They could afford (not just in terms of money, but in terms of time and overall memory) to put this much effort into backgrounds.
I should know. Just making this background took more time than I'd like to admit, and it's a FF6 ripoff. Just think of how long it takes to draw out and animate any one of these, and still keep it within the capabilities of 90s hardware.