As some not deep into networking, just home(lab) stuff, learning OpenWRT took some time. But now cannot think of buying a router not for OpenWRT, once I learn what is possible I want to use it.

Fot example from my ISP I can have two options for PPPoE connection, first is legacy IPv4 only but lacks IPv6, second is IPv4 but behind CGNAT and with modern IPv6. With OpenWRT, I am able to make two PPPoE connection over the same wire and have the best of both worlds.