It's not "twisted into uselessness"... the reduction in routing table size comes from the large address space. No twisting was needed. Also, the routing tables

It's not "twisted into uselessness"... the reduction in routing table size comes from the large address space. No twisting was needed. Also, the routing tables we're talking about here need to be stored in TCAM. Content-addressed memory is a lot more expensive than regular DRAM.