[buzzkillington]

Yes and no.

You can build centralization on every layer of the network stack. Facebook is centralization on the application layer. The problem is that with IP addresses being as rare as they are in the ipv4 space you have a lot of tricks that you need to use and ultimately you go through someone using a real ipv4 address.

Ipv6 doesn't have that, so it lets you decentralize further down the stack. While this is good in its own right, currently we don't have issues with ip address monopolies, unlike application layer monopolies.

And that's the problem we have. Doesn't matter how many open layers you have, someone can always build a closed system on top of them.