War heavy games can be this way, or those where you quickly eliminate your only(ish) neighbor and then settle out. i tend to whip courthouses when I know I'll be ending the game with a single continuous war as well, such as pushing everyone over with Cuir>Cav and mass numbers even if Rifles show up. They are also important buildings where the idea is to settle out a lot of land before the AI comes overseas for it; maintenance can be crippling before Astro or State Property with 20+ cities. I do this on Earth18 all the time as any of the American continent civs but it's not exactly a standard game either, and as Lain has even shown in some games, letting them just settle around you even from off-continent you can still kill em all later so it's not like it's a priority. It just feels....neat, to be more self-sufficient I suppose.