I agree on the upgrade story, though supposedly the recent move to apk will help in that regard.

I moved from pfSense to OpenWRT due to the really poor IPv6 support in pfSense. I don't use the AP capability either. How are things in OPNSense these days?

Particular pain points from pfSense was that it published global IP as DNS address to LAN clients and no way around it, so connectivity broke every time prefix changed, and no real support for specifying prefix-less firewall rules or similar, so couldn't really expose anything via IPv6 without pain.