The slowness to adopt IPv6 is because it's not a great design.
Going from 32-bits to 128-bits is complete overengineering. We will never need 128-bits of network address space as long as we are confined to this solar system, and the resulting addresses are extremely cumbersome to use. (Can you tell someone your IPv6 address over the phone? Can you see it on one monitor and type it into a different computer? Can you remember it for the 10 seconds it takes to walk over to the other terminal?)
48-bit addresses would have been sufficient, and at worst they could have gone with 64-bit addresses. This is already too cumbersome (9-12 base36 digits), but maybe with area-code like segmentation it could be rotated into manageable. 128-bits is just not workable.
> extremely cumbersome to use. (Can you tell someone your IPv6 address over the phone? Can you see it on one monitor and type it into a different computer? Can you remember it for the 10 seconds it takes to walk over to the other terminal?)
That's your idea of "extremely cumbersome"?
128 bit is exactly as hard as four groups of 32 bit.
Going from 32-bits to 128-bits is complete overengineering. We will never need 128-bits of network address space as long as we are confined to this solar system, and the resulting addresses are extremely cumbersome to use. (Can you tell someone your IPv6 address over the phone? Can you see it on one monitor and type it into a different computer? Can you remember it for the 10 seconds it takes to walk over to the other terminal?)
48-bit addresses would have been sufficient, and at worst they could have gone with 64-bit addresses. This is already too cumbersome (9-12 base36 digits), but maybe with area-code like segmentation it could be rotated into manageable. 128-bits is just not workable.