Most consumer ISPs regularly rotate the prefix. IPv6 has proper support for that and can keep connections on the old and new prefix alive for a while in parallel.

With IPv4 most ISPs only rotate IPs on new connections (router restart). But my old home internet even stayed on the same ipv4 for years. Only if I shut down the router for a longer time it got a fresh ipv4 assigned.

So it's an implementation detail, not a technical limitation. Not rotating the prefix is a bad implementation.

Hopefully you mean a static prefix, a static address would be an abomination from an ISP in IPv6!

> https://xkcd.com/1172/

Here I am complaining that I lose my static address, but your problem is that the address is static!

Bottom line is that once a system is a certain way for a while, other systems and people grow dependency on that

>https://en.wikipedia.org/wiki/The_purpose_of_a_system_is_wha...