Diaspora is a poor attempt at copying facebook, it's nothing like the distributed I have in mind, which would be easy to use encrypted self-hosting and not tied to a specific network/website/technology.
So basically implemented with no technology? Maybe just an idea in your mind?
Yes, but it doesn't solve everything and it's not available to everyone.
It addresses a few needs. Don't let the perfect be the enemy of the good.
And there are numerous nodes you can create an account on -- no need to be self-hosting. Though with FreedomBox, that would actually be pretty tenable.