[eternityforest]

Most prsistent files should never be cleaned on uninstall, you don't know why they're uninstalling, it could just be a reinstall to fix something. Configuration might not need cleanup either.

Temporary files often shouldn't exist. If it's less that a few megabytes why is it touching disk unless it will be needed persistently? In any case the detritus doesn't matter, if it's big enough to care I'll see the disk space is low and find it with baobab at some point.

It's not perfect, but it's not a major nightmare.

For my part, I don't always follow XDG specs, I often just create ~/AppName, but sometimes I'll make more than one to keep features within one app separate. I put IP cam recordings in ~/NVR by default, and stuff like that, because the main app dir is all stuff you would backup and restore, which probably doesn't include NVR recordings for a home user.