Fair enough, but any internet facing service is potentially another attack vector. If someone compromised your Umbrel node through a vulnerability in the nostr relay, your sats would be at risk.
Discussion
Sure well there could be a theoretical global catastrophic EMP attack and everything will be lost. But the idea is redundancy so that somewhere it survives, your writing survives.
Sure. If we suffer a global catastrophic EMP attack then a) my relay would probably be hit, and b) my Nostr notes is the last thing I’ll care about
The fact that each umbrel app is running inside of a discrete docker container doesn’t mitigate this?
Only partially. Docker containers only provide partial separation. It’s not like a VM. Your container shares kernel with the host. There have been numerous other container escape vulnerabilities throughout the years as well.