One-click updates work from the dashboard? I don't think they would.

Of course you don't have to go the proxmox route, but it is an easy route.

I have a proxmox cluster, so moving things between machines, high availability, and backups are a breeze. Had an SSD go bad a few months ago, and I just moved everything on that machine to another node until the new drive showed up. It was a pleasant experience.

There's plenty of other ways to achieve this, but this is what I chose and I'm happy with it. It's simple, and I can manage everything from my phone if needed.

Yes, one click updates work just fine. The only difference is the unsupported message which only appears after reboots or an update. Click ignore and it goes away.