> permanently broke the "network of hosts" into asymmetric one of servers and clients. That was inevitable and can't reasonably be blamed on NAT. As but a few

> permanently broke the "network of hosts" into asymmetric one of servers and clients. That was inevitable and can't reasonably be blamed on NAT. As but a few examples. ISPs arbitrarily break things unless you pay them extra. Stateful firewalls are a good thing. Even on my local LAN I can't reliably SSH into my laptop because it's on WiFi and does funky power saving stuff with the chipset I guess. My phone is far worse than my laptop in that regard. Setting up a reliable and widely reachable server requires deliberate effort regardless of the existence of NAT.