Just wanna throw in a voice saying your setup sounds completely fine to me. Maybe it’s a bit odd but it also sounds like how I’d do it if I had storage needs that large.

My current storage needs are currently met with a 2.5" SSD connected to a raspberry pi shared with samba over WiFi though so I’m pretty sure every storage nerd in here is gonna tell me my opinion doesn’t count, take it with a grain of salt.

Well they still have a finite life and are less replaceable than a battery. Even if it quadrupled the lifespan (which is a reasonably generous estimate given OP’s 4-year duration and wikipedia telling me supercapacitors last 10-15 years), it would still eventually need to be replaced and that would generally require resoldering it.

I think a much better solution is 2 battery slots, one to be a backup battery, unused, and then when needed, an LED on the mobo can be turned on. Honestly OP could jury-rig up a similar system if he wanted to, although it’d be a bit ugly and anytime something is jury-rigged I don’t really think of it as reliable.

The only real solution is to make this an extended maintenance task. The batteries are cheap so an alert every 4 years is likely sufficient to replace the battery before it dies. You could do it every 2 or 3 years instead at your discretion.

Dunno enough about ipv6, wouldn’t my ISP still need to allow it?

That’s my understanding, and there’s no option in their locked-up router to enable it, for ipv6 either.

I used a pi 3 to host a Foundry server (TTRPG software).

I use Docker to simplify things, since I run two instances of it. Simple port forwarding setup within the docker container. the main reason I used a pi instead of my computer is so my players could access their dnd stuff all the time.

I stopped because I switched ISPs and they won’t let me port-forward. My vpn supports it but the latency isn’t ideal. I host the same thing through a cheap server now.