I had a sizable base built in single player and a smaller colony in the scorched earth single player. An update wiped my base and takes on the main island, so I transferred over my best wyvern to start rebuilding. Worried that the next big update might wipe my progress, I stored my wyvern in an obelisk. Lo and behold, the next update did...nothing...to my base. Everything was still there. Everything in the obelisk, however, was gone. I'm taking a break until tek tier drops