I used OPNSense briefly when I got 1gig synchronous fiber ~2015 at home on an old i5 desktop, which I think was shortly after the pfSense fork, and then found Mikrotik and RouterOS. Used RouterOS at home since and have been replacing aged out Cisco switches in the datacenter (100gig) and closets (20-40gig) cheaply. I'm looking to dump a handful of ASA's for OPNSense and the messing around I've done so far has been positive. It's aged nicely.