What they can implement is to slowdown the commit rate, rate limt or just queue-up messages not to overburden their downstream service.

I don't think GH has any of those, but just keep scaling, but that scaling failed.

Just bad architectural decisions from the postmortem.

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It will only get worse due to AIs spawning massive commits, and they don't have unlimited cloud resource.

They can scale but not scalable in terms of effort, resources, and $

This stuff is good! This is what a booming economy looks like. There are people out there competing with you for resources because they have cool ideas they want to implement.