Now I have a spare mini PC. I didn't mean to...
I bought a random cheap PC for OPNsense. It has two NICs, but unfortunately they're Realtek, and not supported by OPNsense without kernel hacking. I don't want a router that's hard to upgrade/reimage, so I'm going to get something else that has dual Intel NICs.
And I messed up the Windows image on the SSD before I realized my mistake. So I can't in good conscience return it.
This morning I finally replaced the home router. The new one is a Protectli V1211. I imported my OPNsense configuration, then updated to the latest release. If you're reading this post, it's working.
The whole thing was remarkably painless. The only tricky part was that I had to reassign all the interfaces and VLANs to match the new box's hardware.
The old router is on hot standby until the new one has soaked for a few days.
@reconbot I keep hearing about ProxMox. Is ProxMox the new VMware ESX now that VMware has gone to seed?
I run TrueNAS on my NAS. I'm happy with it. I will eventually need to migrate from TrueNAS Core to Scale. (After I get OPNsense squared away.)
@kbob I use ProxMox to make my physically small dell workstation home server provide a few different services. I have unraid on a nas but it came with it. ProxMox is nice, open source, and does the advanced stuff without making the basic stuff hard.
I needed a vm for home assistant and I wanted to run docker containers for home services. It's got LXC containers (not docker) which are like vms but are super small and have no vm overhead.
Kernel Bob 
Francis 🏴☠️ Gulotta