[bjeanes]

The biggest advantage I see (which is heavily coloured by the use cases I faced at Heroku on the Add-ons team) is being able to peer many VPCs without gymnastics to avoid IP range clashes and routing issues. I haven't looked at AWS' IVv6 announcement in enough detail to know if it addresses this head on, but I always looked forward to IPv6 as an avenue to making that kind of work much more straight forward.

[zonknz]

But if the peering limit is still 50 vpcs - I guess it might help if/when inter-region peering ships

[toomuchtodo]

Don't plan on inter-region peering ever shipping. Easy to do in network fabric at a region, not so easy to do across regions (constrained by fiber connectivity).