alt Hacker NewsA monorepo gives us a really consistent tooling floor where everything more or less works in a uniform way. We've had a lot of success with it, in general, and it gives us a lot of leverage in the sense that we can make a sweeping change in one atomic commit rather than have to run a campaign across hundreds or thousands of repos, all with their own norms and tools.
yes, the atomicity argument is the strongest one to me as git submodules are a genuine pain to work with and still don't solve the problem well. Yet a clear transaction around a change affecting multiple components gets even more important as the rate of activity and associated contention rises.