It’s a little bit unfamiliar, not the end of the world. It’s not complicated and not as nuanced as ipv4 networking. No dhcp necessary anymore on your local network, how good is that? No more trying to hardcode MTU, no strict/open/hairpin/fullcone/etc NAT issues because no NAT, no port forwarding, no fear of IP collisions, less overhead, freedom of many public addresses per interface - host each app on its own public IP address if you desire. Ipv4 over ipv6 is part of the spec so you would never lose ipv4 connectivity. I could go on