I've been impacted once: An action that failed to start (a PR check), then the merge button on that PR having no effect. Thankfully there was no urgency. It's a bit distressing because GitHub is kinda the engineering hub of the companies. We do have copies of the codebase on our computers and can launch build from there, but we have a process for a reason, and bypassing it is hacky.

prs not being visible because search is down, various ui elements not loading, pushes failing, merges failing, gha runs that fail with random errors or take forever to schedule

i literally do not recall the last day that passed without someone on my team noticing that some portion of gh was degraded.