[treffer]

These are implicit. The IPv4 space is hard money. Demand is high. So ISPs make some money having IPv4 space now.

I've definitely seen this. That's how IPv4 connectivity became an enterprise/business line feature on some ISPs.

A neglected detail about CGNAT is that it has lower the quality of IPv4 connectivity. Higher latency + more connectivity issues.

So if you offer a service then you should offer it on ipv6 due to that.

That's a really slow transition though. So I wouldn't expect this to kill off IPv4 any time soon (say 10y), but longterm it's been the trajectory already.