That said, I keep finding more AppData files in my Documents folders than the other way around. Linux software (especially legacy software that doesn't respect the XDG spec) is the worst for that, somehow spreading files and directories across my user profile directory and my documents directory.
Seemed like a bunch of disparate things with the most common probably being a dumping ground for programming language library caches (Maven and NuGet and maybe another couple).
Which programs do that? Or do you think things like preferences for programs should live among your documents?