Coffee Stain's another good example on the bigger end.

It does seem like there's a danger zone behind a certain size threshold. It makes me worry for Warhorse (the KCD2 dev), which plans to expand beyond 250.

I dunno, dwarf fortress seems to be doing alright for itself so far. Tarn and Zach really needed some more help and some graphic design backup. I don't agree with the total abandonment of the keybindings system in favor of mouse clicks, but I understand that it was necessary to make the game's learning curve less precipitous.