I'm still amazed at how much sandbox replayability there is in a game that's eight years old, takes up only 20GB (on my Series S), and doesn't require a constant internet connection (you can literally play it for weeks completely offline).
I currently live in a remote area where there's no internet at all (I occasionally go into town). I was still quite young when Diablo 2 peaked in popularity, but I think I wouldn't be far off the mark if I called State of Decay 2 something similar.