If anyone used to play Zero Hour, there is still an active community. They still have tournaments and world series. A guy called Dominator on Youtube casts it all and its a pretty entertaining blast from the past. I recommend checking out his channel.
I'm pretty sure there was a weird bug in the original C&C generals where the game engine 'tick rate' was somehow tied to CPU cycles and assumed single-threading or something.
I remember going back and trying to play it many years after it came out, and it was basically broken because the entire game moved at like... 2-3x the maximum speed it was ever meant to run at
Same with Red Alert (etc) through the modern rewrite OpenRA (https://www.openra.net/). Similarly there is a guy FiveAces who has been commenting videos for nearly a decade.
