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.
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.