Seems like a very reasonable reason to switch to another isp well established in the 21st century

Fuck, there is a law in internet (which name I cannot recall) about the impossibility of distinguish an ironic message.

I felt in that trap completely!!

What a lot of nonsense. Of course the technology exists and of course it can be done. But in reality is not done because it simply doesn’t bring any benefit.

And in addition a address translation is not nat ™ because the server can be hit from the outside.

Today in ipv4 we have likely 2 Nats, 1 after your router and the other by the carrier (cgnat) and ipv6 those are non existent

Ipv6, get an ipv6. There is not nat in ipv6