Decentralized version control only works if there is some way to find and access those distributed repositories. For many reasons and no matter the tech there is always a drift towards having a centralized registry so that the degrees of separation for individual actors is minimised. Be that a search engine or code forge or social network.

For *most* users, fully distributed and disconnected is a bug not a feature.

I don't miss the days when every project had it's own SVN server....