Not really, it assumes people will make IPv5 devices without a reason to. If you can get them to make IPv5 you can use the same mechanism to get them to make IPv4/6 dual-stack.
People already make ipv6 devices, that's not the problem though. It's also maybe possible to do ipv5 with ipv6 hardware at least on the hosts, since the v6 header is totally fine for this.
V4 address blocks, DHCP, and NAT, not SLAAC. So if I have 1.2.3.4 in ipv4, my ipv5 address is also 1.2.3.4. Ipv5 isn't a separate network from v4, it shares all the v4 state, and I can enable without giving it much thought. And once there's enough adoption, I can start handing out addresses like 1.2.3.4.5 that are incompatible with v4-only hosts.
[–] mahboi 10 hours ago
[–] cowlevel 4 hours ago
[–] mahboi 3 hours ago