Just wanted to chime in and say thank you Seth for all of the work you did to create LetsEncrypt.

You've made the internet safer for all of us.

I believe that IPv6 [1] is without a doubt coming in the future. Even with carrier grade NAT'ing and the likes, there are too many major providers who have already switched to single stack IPv6 natively.

That said, I agree that 240/4 is necessary to assist with the transition. Due to the fact that most network operators aren't even dealing with /24's, it becomes increasingly hard to facilitate bridges between the legacy IP and IPv6 so more IPv4 space is always appreciated (until the day we don't need to bridge at all).

[1] I may have a bias due to affiliation with https://IPv6.rs