Git is just not suited to truly large monorepos, and it won't ever be. That's totally fine, of course. Less of a monoculture here would be great.
> under 1 commit per second
Sure, for arbitrary pushes, that's not a big deal. But for large repositories, with those changes landing on trunk at that rate, once you start talking about "commits per second" it gets very difficult.
Just for comparison' sake: Google employs ~60,000 engineers. Anthropic has maybe 2,000. My uncharitable (and admittedly unverifiable) read is that even if they weren't directly experiencing this problem, the optics of being their size but needing Google or Meta-level scale for their work is a comparison they are happy to invite folks to make going into IPO season.
Maybe they do! But, well, I simply do not find them a reliable narrator.