It doesn't matter. IPv6 is happening, its way past the point of no return. Nobody is entertaining the idea of dropping ipv6 and doing something else. Any remain

It doesn't matter. IPv6 is happening, its way past the point of no return. Nobody is entertaining the idea of dropping ipv6 and doing something else. Any remaining problems that IPv6 has are more realistic to deal with within ipv6 than scrap the whole thing and start again from scratch.