Why do you like NAT?
Does your router being slower and taking more CPU make you feel happy?
Do you enjoy not seeing the correct IP in remote logs, thus making debugging issues harder?
Do you like being able to naively nmap your local network fairly easily?
I like all the computers in my house appearing to remote servers as a single remote host. Avoids leaking details about my home network.
Perf concerns over 32bit numbers ended in the nineties. Who at home cares about remote logs?