That's not really consumer grade, though. Not something your average mom and dad can go buy at Best Buy and have working without external assistance.
Flashed TP-Link routers, hostapd on a NUC-style PC, Mikrotik, even Ubiquiti Unifi are what I would consider way beyond general consumer level. The userfriendliness just isn't there.
besides the fact that that requires a lot of technical expertise and voids the warrantee, from my experience hardware that is even compatible with open source firmware like openwrt is much harder to find and can be more expensive.
A router that analyses the packets and allow- or blocklists packets based on features would be useful.