Techs IIJ is not using, and no plans on using

Site-locals in general/for IBGP
Tried it but benefit was too low
It is nontrivial for us to return the current sTLA to RIR - we handed them out to the customers
Router renumbering (for backbone)
Again, we'll use 2001:240::/35 anyways
Renumbering an ISP is non-trivial (if possible at all)
EBGP over tunnels/tunnels across AS border
We peer over IPv6-native only (at IXes, cross-connect)
With tunnels it's difficult to track down problems/keep quality
Routes from tunnel peer are unstable
Most of tunnel-based peers are not that serious about IPv6
Peers disappear without notice
All translators and transition tools as service
(next page)