Although I have played and enjoyed some of the crunchier games out there, sometimes they just start to feel more exhausting than fun. I’ve also found it hard to get players to buy into games where you have 20+ different questions/choices during character creation.
Ontop of those, sometimes a systems release schedule has made me stop wanting to run the game, I am personally not a huge fan of games that put out 3+ books a year,
How much is too much for you/your table?
I think I’m pretty flexible when it comes to games. I actually play Pathfinder 2e as a co-op/gm-less game and find the crunch enjoyable.
On the other hand, I also play games like City of Mist, FATE, Thirsty Sword Lesbians, and Monster of the Week, all of which are pretty rules light. Savage Worlds is my medium crunch game of choice.
For me, there’s not really a limit. If there is a game system that fits best with the campaign idea I have in my head, that is the system I will use to run it.