Here is the same explanation by Colin back in 2019 after they moved some things around.
and here the official help page
https://help.sketchup.com/en/sketchup/setting-software-and-file-preferences
so yes, here we’re not talking about a crash, we’re talking about file corruption, auto save won’t help, only skb. until it can’t.
Whatever you do, people, don’t forget to manually save your work from time to time.