@MajinBlayze
@hexbear.netA VPN is definitely an example of software you should use rpm-ostree to install.
To add some detail, anything you install in a distrobox (or other sandbox/container) can't add kernel modules, which I think is the error you're getting.
It's not quite that simple.
Each package can choose one from a handful of runtimes to use, each of which include common dependencies (like gnome or qt libraries), and if multiple flatpaks use the same runtime, that runtime is only downloaded once.
It is less space efficient than your typical package manager, but brings other benefits like sandboxing.
Yeah, I don't think there's any getting around that. Apt package modify the system, and by nature require elevated permissions.
For flathub packages, you could switch to user installs instead of system. Settings, then click the up arrow next to flathub (user) (if it's configured, otherwise you'd have to add it)
It will prevent multiple users from being able to use the same installation of packages, but if you're the only user if the machine it doesn't really matter