The same reason people reread books, rewatch movies/tv shows or go back to a nice restaurant/bar they’ve been to before:

You enjoyed it once so you go back to enjoy it a second time.

Seems like a you problem. Just click “read more” on the Steam store page and it will drop down and show you all the content of the different versions.

Disco Elysium, The less you know the better and funnier it is.

Graven, Avowed and Space Marine II.

The original Prey 2 they showed off ages ago where you were a bounty hunter on a giant space station. Was really looking forward to that before Bethesda canned it.

Good choice, Terraria would be my pick too.