I installed linux on my PC a couple months ago. The other day I wanted to log back into my windows partition for the first time in a while in order to clean up some of the files on that partition (even though the drive is mounted in linux, the windows “fast boot” option apparently leaves it in a state that linux considers read-only). Windows apparently wouldn’t let me log in without a microsoft account, instead of just using my regular windows username.

So yeah, that partition’s gone now. No going back!