Of course it has to be used with another sandboxing layer to be effective. You don't have to create a container by yourself, a good desktop will do it for you.

Of course it has to be used with another sandboxing layer to be effective. You don't have to create a container by yourself, a good desktop will do it for you. One such solution is Flatpak. Many applications don't work that great with Flatpak yet and require quite sweeping additional privileges, but we will probably see improvements over time. There's nothing wrong with users deciding to just have a common folder with all their data, but some applications are of more sensitive nature than others and it should be possible to secure them better. For example password managers or terminals.