> Edit: To make everything a bit clearer, the idea with this "ipv4+" is that you don't need the complexity of running both ipv4 and ipv6 as you do now. I find

> Edit: To make everything a bit clearer, the idea with this "ipv4+" is that you don't need the complexity of running both ipv4 and ipv6 as you do now. I find that very wild optimism. - You will still get two incompatible address space V4 and V4+ and that would imply: -> You still need to modify your software to adapt for V4+ for the transition. -> Most of your middlebox and firewall rules will get in the way for anything served over V4+. Exactly like for V6 -> DNS would still need to be updated with new record and it will be the same mess It would be mostly the same mess. IPv6 has its quirks, but let's be honest: the main problem with Ipv6 is not technical any-more. The main reason the switch does not happen is that there is no business incentive to switch to IPv6 for most companies and consequently, most companies do not give a fuck.