[ziml77]

If I didn't have A installed and then I install B which transitively installs A, then I expect that uninstalling B will also uninstall A. If only one system is managing the packages, then it is able to do this. It will have a record of the things I've explicitly installed so it knows what dependencies are safe to uninstall.

[kgwgk]

I prefer a package manager that tells me that there are things that may be safe to uninstall to one that decides to uninstall things on its own.

Maybe I installed B who installed A. Maybe sometime later I needed A and I didn’t do anything because it was already there. Seeing A disappear when I uninstall B may be unexpected.