You could argue the scales are different, but computers are also faster now.
So, argument to credentialism out of the way... What should we do as consumers if a provider that is a defacto monopoly due to network effects stops functioning?
Scale is everything and a faster computer doesn’t always help. Vertical scaling has limits, and complex distributed systems are complex.
Since you seem to possess a diagnosis and remedy with a reasonable amount of certainty, I’m sure they’d love to hear from you and have you fix all their problems for them. Especially if you can do it while not making the problem worse in any dimension.
I skimmed your profile. Working on the infrastructure for a couple mid-tier video games is a cool accomplishment, but equating this to having solved GitHub level scale rings hollow.
GitHub has a couple orders of magnitude more daily active visitors than the games you worked on had at their peak.
You can make valid criticisms of GitHub without trying to reduce their scale or inflate your credentials to create a false equivalence.
I didn't make one. The sentence after "I have" was literally "you could argue the scales are different."
GitHub spent a decade asking the world to host its code with them. They got what they asked for. You don't get to beg everyone to run services for you for ten years and then have "scaling is hard" be the answer. They should be improving, not regressing over time, and they have some of the worlds best engineers and a trillion dollar corporation behind them, they don't need my sympathy.
The original question is still open and nobody's engaging with it.
Discarding legitimate criticism based on some self-determined criteria of intellectual superiority isn't a good look. It smacks of elitism and isn't something conducive to a productive and positive community discussion.
It is unhelpful, rude, condescending, and completely fails to address the underlying problem.
The earn bucket loads of money, they should be planning for exactly that. And testing for it via load testing every day.
Perhaps you've forgotten the days of GitHub presenting themselves of software engineering thought leaders.
Genuinely could use a refresher here.