[ants_everywhere]

I find it obnoxious when apps make me hunt for all of their cache directories. Just put all the cache data in one place.

Make it clear what needs to be backed up, what is ephemeral, and so on. Just put everything in ~/.cache. Chromium in particular is bad at this and has many types of cache.

[tracker1]

That's where I would probably split myself... ~/.cache/appname for cache data, and ~/.???/appname/* for everything else.

This is a huge part of why I like docker-compose and docker in general, I can put everything I need to backup in a set of volume maps next to each other.