Some people don't mind starting from scratch, others prefer to enjoy the advancements they've made. I don't really care to start over, myself.

I'm not someone who's ever pushed heavily towards end-game content since building a homely area and hunting in the first two biomes is already pretty enjoyable for me, but even with the lack of heavy endgame progression- starting over means rebuilding a home and all the things that come with it. For me, that means a dock, a storage warehouse, paths through the woods, outposts, and so on.

It's a bit of the same topic as MMO-RPG players deciding whether or not to start a new character. Some stick to a "main," others make an occasional new character, and some are almost permanently stuck to starter zones because they make new characters that often. And when it came to that, I was the type to stick to one character because there was already plenty of progress there that I wouldn't have on a brand new one.

I get the appeal of a new start, though. It's just not for everyone.
I'd rather find new ways to enjoy a game like this on a main seed without starting over.