>> For games its generally not worthwhile since the performance is almost entirely based on gpu these days.
It completely depends on the game. Civilization series, for example, are mostly CPU bound, which is why turns take longer and longer as the games progress.
Factorio and stellaris are others i’m aware of.
Factorio it's an issue when you go way past the end game into the 1000+ hour megabases.
Stellaris is just poorly coded with lots of n^2 algorithms and can run slowly on anything once population and fleets grow a bit.
For civilisation the ai does take turns faster with a higher end cpu but imho it’s also no big deal since you spend most time scrolling the map and taking actions (gpu based perf).
I think it’s reasonable to state that the exceptions here are very exceptional.
If Civ/Stellaris devs can't handle something as basic iteration vs recursion, then they are damn lost.
Also, a language with a GC (not Java) would shine there, it's ideal for a turn based game.