If you think companies like Google are slow, you should look at the enterprise world. I do some technical due diligence work from time to time, and although th

If you think companies like Google are slow, you should look at the enterprise world. I do some technical due diligence work from time to time, and although things have gotten better of the years it wasn't that long ago that there was a more than 50% chance of seeing companies that only have source code repositories at a team level and 20% chance of them not even using a VCS to manage code. I work for a company now where top management doesn't even understand what a repository is and what role it plays in software development. Yes it is that bad in much of the "entreprise" world. Yes, Google had a monorepo before git was in widespread use. They used Perforce while I was there, which was a miserable, miserable experience. It only worked because they poured engineering effort into making it somewhat tolerable. I think it would be wrong to say Google chose a monorepo because it was the best choice. To be honest, I don't think they really planned how to deal with many thousands of developers when they made the choice. They just did what seemed to make sense at the time and then had to make it work as the challenges started to mount.