There is in fact an options section in v4, and I think it's pretty obvious how it could be used: you could put extra address bits there.
The problem is... how do you get those extra address bits to work?
If you think through that question and produce a working answer, your working answer is going to be roughly the same as v6 -- and have the same issues v6 does. Almost as if the people that designed v6 weren't completely clueless.
The problem is... how do you get those extra address bits to work?
If you think through that question and produce a working answer, your working answer is going to be roughly the same as v6 -- and have the same issues v6 does. Almost as if the people that designed v6 weren't completely clueless.