Asking Greg during the Summize due diligence what his plan was for stabilizing Twitter. He answered that there was no magic bullet. He said they weren’t going to do one big thing, they were going to do lots of small things. The first thing they did was instrument the hell out of the system, they started measuring everything and finding the bottlenecks, and then they started knocking them down one by one.
Twitter has an entirely new architecture now. But they did not rebuild Twitter, they just replaced one thing at at time and evolved it. They went from a monolithic beast where everything was connected to a distributed set of services that work together but are separate from each other. And that is Greg’s legacy.