[throwaway1105q]

Running out of ports how? Someone is hosting 65536 public services in their home network? Why not just pay for an additional public ipv4 then?

I can't configure anything technical about my internet. Any change is paid, and often simply not possible.

[toast0]

Running out of ports is usually a misunderstanding, but a device doing stateful NAT will have a limit on how many states it can manage, and it's usually not fun when it goes over the limit.