I used to have a little program that would save a file to a user’s desktop. it was made to help with manually compiling files to send out in a package, and every user has a desktop, right? so just save the file there, instead of taking up space on our cloud storage or something (these are often big files, but they only exist for a short period of time) then OneDrive came along and all of a sudden the tool stopped working, because the desktop folder no longer existed. that was a weird one for me