I’ve had Windows kill itself by doing a BIOS update and deleting the bitlocker keys in the process, on a computer where bitlocker was automatically enabled by the OS without the user knowing, and of course, without any backups of the keys except on a Microsoft account that was only logged in on that computer (the user didn’t know the password for the account either). I know there’s user error in there, but for an OS that caters to people who barely know how to use a computer, it seems like a terrible choice to do all that.