I like the idea of containerised apps, especially if you can have multiples of the same app.

A few years ago, when I was pretty much fully on Windows, I used PortableApps to manage a few websites and their emails, and having a simple way to do the same thing is one of the few reasons I'm still stuck with Windows.

On top of that, I like trying out new apps and programs, but uninstalling them doesn't always get rid of the extras, like new dependencies.