Because I hate Electron
Docker, Distrobox, Toybox, systemd-nspawn, chroot.
Technically those all rely on the same kernel namespace features, just different ways to use it.
That’s also what Flatpaks and Snaps do. If you only care about package bloat, an AppImage would do too but it’s not a sandbox like Flatpak.
Don’t use docker with distrobox. Use podman instead as it is rootless and faster
Podman goes well with Kubernetes. It also is more performant than docker.
I use both