In all fairness, the features expanded substantially after the acquisition so there's are a lot more components that can experience downtime. Pre-acquisition, github was a fairly simple code repository with issues bolted on. Actions, Dependabot, Codespaces, Advanced Security, Package Registry, Copilot, etc. all came after the acquisition and probably involve much more overhead than what github was prior to the acquisition. It basically went from code hosting platform where machines are sitting idle when pushes and pulls aren't happening to a fully integrated developer ecosystem. Any one of those things experiencing degraded performance is going to show up on an uptime chart.