I still find it hilarious that, upon the bulk of SCM use shifting to a DVCS, the first[1] thing people did is run out to build a central hub.
[1] For the pedantic, it probably was not literally the first thing; I'm sure some folks went to the rest room, others ate something, still others took a nap.
The thing with DCVS is not that central hub does not exist. It is that you do not need specific central hub. That means if github dies, I can take any of my git repos I checked from github and continue working with them, and create a local git server that would allow others to work with it. Of course, there is a convenience value in having central hub. The point is not denying that, the point is turning it from necessity to option.
[1] For the pedantic, it probably was not literally the first thing; I'm sure some folks went to the rest room, others ate something, still others took a nap.