[devplusops]

HE.net's free tunnel broker is pretty awesome. They'll even speak BGP to you for free if you have your own allocation, which is no longer that expensive.

Furthermore, simply using IPv6 internally - and you can route it over the internet via VPNs etc - is a huge win.

E.g. you can give each docker container a globally routable address. Globally might be 'within your network', or perhaps you have translators from global IP space to your own internally routable space at the edge of the network.

Don't you have all this with v4? Sure, but not as easily. With v6 you can route subnets and re-route sub-subnets. And you can do this all day long without running out of address space. Doing that in v4 is much harder.