I'm a former pfSense user that reluctantly moved to OPNsense a handful of years ago after a lot of bad press around Netgate started circulating widely causing me to believe that support for the community offering might wane over time. I was under the impression that many people had moved off of pfSense for home use. I'm surprised by your assertion that it "remains dominant" for free users, and I wonder how you might know this?
OPNsense has been rock solid for me, btw. I was reluctant to switch only because of the time sink and perceived risk. Nobody wants to spend a weekend debugging VLAN tagging on their WAN port or some such. Luckily for me, there were no such issues when switching over.