the parent commentator was joking that git _is_ decentralised, but that we made it centralised again by relying on a small number of hosters (github, bitbucket and others)
This just keeps happening. It's not GitHub's fault that they keep getting DDoSed or have a network outage every now and again. But it's not a problem with no solution.
Github is trying their best as far as I can see, they manage to fix the majority of issues within three hours and even during those three hours its not the end of the world because you can still code.