German ISPs are kinda weird like that. Unmetered gigabit FTTH for $70/month, no CGNAT, and open peering. 3 phone numbers and 2 phone lines included. But static IP isn't even an option.

I've built custom dyndns scripts to automate everything away, so nowadays it's only a second of interruption (thanks to some DNS TTL trickery), but it's nonetheless really annoying to deal with.