nitrolife

SNAP in the recommended packages of the ubuntu-server metapackage. Ubuntu installs all recommended packages by default. So SNAP is in the server installation, moreover, it can’t even be simply removed without completely blocking in apt policy.

If you’re planning to use old hardware for hosting, don’t use Ubuntu. SNAP will kill performance.

So your choice is Debian.

P.S. VPS is already a Virtual Private Server and you can’t install ProxMox or any virtualization on it. If you want experiments, look into containers.