A platform that nobody develops for isn't really a good platform for gaming. And I don't see why developers would bother when Apple is just going to break compatibility for their games in a few years unless they keep updating it.
Apple doesn't just remove architecture support, they remove APIs too.
My last, and brief, foray into games development on MacOS was quickly soured by things breaking between point version updates. Even things as crucial and simple as pushing pixels onto the screen broke as Quartz APIs changed
That's generally true of any change that Apple makes. They telegraph the change directly, yet it's largely ignored, usually wilfully, and the caterwauling starts as soon as they take the action that they say they are going to take. Take the M-series transition. When M1 was announced (mid 2020), Cook said that they expected to complete the transition in 2 years. If you have a pre-2020 mac, expect the next macOS to be the last.
