i think the world should eventually become Unlimited like how minecraft has it... there could be camps for other A.I's and possible online players. there could be huge amount of different tribes and gangs. you would never run out of resources like metal. my other idea i had was make a very very big world and make it round. multi-player would be cool... you could become allies with many other tribes and also make many enemies. you could also trade with each other to.
Not easy to program , especially right now.
Grids/co-ords on spheres is tricky. Its like the universe didnt want us to play rimrowld/df/minecraft on a sphere.
Making square grids on a sphere is tricky. Making hexagon grids on a sphere is a challenge. Making RimWorld on a hexagon grids is a path Tynan isn't likely to walk on.