benefit of having dependencies containerized

wait just a minute there. So I just not that long ago started playing around with docker containers. And one thing that I love is that it’s not installing and leaving behind leftover dependencies when you remove/uninstall whatever program/app you were using. Are you telling me that Flatpak does that? Because if so that is amazing. And if I ever make the switch from Windows to Linux, I’m definitely using Flatpak (and apt. Fuck snaps)