In Civ5, Trading Posts made desert and tundra tiles - tiles that were often too unproductive to be worked - somewhat palatable. Since Civ6 doesn't have Trading Posts, and since Farms can't be built on tundra tiles, these tiles are virtually worthless (resources and religious beliefs notwithstanding). At least desert tiles can be enhanced with Petra and rain forest tiles can be boosted via Chichen Itza. Unfortunately, there is no similar wonder that boosts tundra. So my question to you guys is this: what do you do when you wind up with a tundra start? Do you ride it out and make the most of it? Or do you migrate elsewhere (or restart and hope for a better starting position)?