Ok, I will keep that in mind. I’m just wary of what you said earlier:

You can fuck up both Ubuntu and Debian’s upgrades by adding a lot of 3rd-party repos because apt doesn’t safeguard against external repos interfering with the core repos’ dependency graph.

You’re not the first person to tell me not to add too many external repositories on Debian for the same reason.

Maybe I don’t need the new features :)

So the trick is to keep the OS minimal, install only Docker from its repo and install anything else in Docker containers.

Why from Docker’s repo and not from Debian’s? I just did a quick apt search docker and I see docker.io and docker-cli.

So, theoretically, I could run Proxmox on the VPS if it’s running Debian? I read that Proxmox requires a lot of RAM and VPSes are too expensive in that regard. But I might run Proxmox at home, I have a beefy PC with 64GB of RAM, except it doesn’t turn on right now (something died, either the PSU or the motherboard, I still need to have it diagnosed).