And... as I always say when these threads catch my eye.

Still using my original day one world about 1500+ days last time I bothered to check.

Every time a new major update drops I fire up the "Upgrade World Mod" run it once then uninstall. SO far has worked like a charm allowing us to redo places we've already strip mined (Provided we left no building items behind otherwise it skips that area so have never lost a Building either).

But I appreciate not everyone wants to use any mods as their are not "officially " supported as the Devs want to do it all in house: Which I feel is a mistake, but its theirs to make.