Getting ready to issue IP address certificates

So all the addressing bodies (e.g., ISPs and cloud providers) are on board then right? They sometimes cycle through IP's with great velocity. Faster than 6 days at least.

Lots of sport here, unless perhaps they cool off IPs before reallocating, or perhaps query and revoke any certs before reusing the IP?

If the addressing bodies are not on board then it's a user responsibility to validate the host header and reject unwanted IP address based connections until any legacy certs are gone / or revoke any legacy certs. Or just wait to use your shiny new IP?

I wonder how many IP certs you could get for how much money with the different cloud providers.

Iirc AWS Application Load Balancers (HTTP/L7) will cycle through IPs as fast as every 30 minutes (based on me tracking them ~5 years ago). I think they set a 10 minute ttl on their DNS records