> It’s grown in a way that degraded it

Im an outsider and a layman, so this might be totally off base, but...

The way I hear people talking about github reliability doesnt sound like scaling problems to me. If you drive 20 miles every day but then decide to drive 2000 miles and run out of gas, thats a problem of scale. If you drive 2000 miles and your engine explodes, thats a problem of design.

Maybe their design problems are being made evident because of sudden scale, but they're still design problems.