> Not at all. Apt has been able to remove everything for the last 20 years.

Not really. It can remove configuration files etc. it knows about, but it can't know about files later created by the application itself.

I'd say that's either 1) outside the scope of the package manager, or 2) mostly-solvable as long as your package manager allows you to specify "extra files created by the application that I do not install but I will want to uninstall."

That's also not what's being asked for here. The basic request is this: track which packages were manually vs automatically installed, and give the user the ability to remove automatically-installed orphans whose manually-installed reverse-dependencies are no longer installed. This is what APT does and it works fine 99% of the time.

Isn't that a feature? Should my settings be cleared if I uninstall a program and reinstall it later? Should all my libre office documents disappear when I uninstall libre office?