If you want the net to support end to end connectivity we need IPv6. Otherwise you'll end up with layers and layers of NAT and it will become borderline impossi

If you want the net to support end to end connectivity we need IPv6. Otherwise you'll end up with layers and layers of NAT and it will become borderline impossible. A lot of protocols get unstable behind layers of NAT too, even if they're not trying to do end to end / P2P. It adds all kinds of unpredictable timeouts and other nonsense.