I use Podman on my desktop, but only for that single container (I need Microsoft SQL Server for work). I know they are 99% compatible, including CLI syntax, but in that 1% cases things might break and thus https://selfhosting.sh/ is recommending to stick to Docker for newbies, because almost all tutorials are written for Docker. I don’t know, I might try with Podman, however I don’t really need a steeper learning curve if whatever setup guide for some service that I’m using is not compatible with Podman.

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).

One thing I read about is that Ubuntu provides unattended updates, so it can automatically update packages and restart the server (that seems a bit too far ;) ). It’s probably possible on Debian but not out of the box.