> a lot of infrastructure quietly assumes GitHub is always available

Which is really baffling when talking about a service that has at least weekly hicups even when it's not a complete outage.

There's almost 20 outages listed on HN over the past two months: https://news.ycombinator.com/from?site=githubstatus.com so much for “always available”.

Part of it is probably historical momentum. GitHub started as “just git hosting,” so a lot of tooling gradually grew around it over the years — Actions, package registries, webhooks, release automation, etc. Once teams start wiring all those pieces together, replacing or decoupling them becomes surprisingly hard, even if everyone knows it’s a single point of failure.