[nextos]

Snap and Flatpak do both sandboxing and package management.

You can use the underlying sandboxing with bwrap. A good alternative is firejail. They are quite easy to use.

I prefer to centralize package management to my distro, but I value their sandboxing efforts.

Personally, I think it's time to take sandboxing seriously. Supply chain attacks keep happening. Defense is depth is the way.