The Jackbox Megapicker was corrupting SteamOS and forcing people to reinstall the entire OS. It’s been fixed with a hot fix for now, but probably safest to avoid it until they get this all sorted out.
Fix For Jackbox Megapicker Corrupting Steam Decks Released - Steam Deck HQ
steamdeckhq.comThe Jackbox Megapicker launcher has been corrupting Steam Decks, but a new hotfix was released that temporarily fixes this.
I hope it’s a case of the writer glossing over details, like it corrupts its own files in a way Steam can’t understand or recover.
The implication that a malicious app can break the whole OS is scary.