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This is also mirrored by many not-so-big javascript projects, i.e. see the adoption of https://github.com/lerna/lerna

Note that Amazon is not on your list. They did not adopt the mono-repo approach. Their tools have their own advantages and disadvantages, to be sure, but mono-repo is not the only way.

I hadn't heard about Amazon. That's good to know.

Read Steve Yegge's Google vs Amazon rant: it's amazing.

https://plus.google.com/+RipRowan/posts/eVeouesvaVX

> no-one is publicly admitting to using many small repos.

Amazon. They built an entire system around managing versions so that they can make it work.