The original idea behind the IPv6 TLA, NLA, SLA was a geographical and administrative hierachical design, in the century of *competitive* operators this concept is *broken by design*.
It was never tried so how can you say that it was broken by design? The IPv6 is so vast that perhaps we should offer some address space to be allocated by geography and see where it leads to. Let the market decide rather than forcing everyone into the "one true way".
*However* all this solutions have one impact: - New BGP protocol, new routers, new budget ...
New routers? Since when does BGP or any routing protocol have to run on the routers themselves. Look inside a modern router and you will often see that the routing and packet forwarding decisions are done on separate CPUs. And there are boxes on the market that do "route optimization" which is just a way of taking the routing decisions outside of the routers themselves. --Michael Dillon