Advantages of Monorepos (2015)
One upside of smaller repos that I rarely hear about is that it forces you to think about versioning. If you have a monorepo, you often don&#x27;t version individual components, you just have master that always builds. If your product is a user facing website, that is fine. But if you make releases, and have multiple components in different versions that have a stable API, and are expected to work in different combinations, then it is a real hassle. Of course you can tag individual library versions in a monorepo, but that is not the way of least resistance.<p>One place I&#x27;ve worked at migrated to a monorepo, the ATLAS experiment at CERN. It was not bad, although there were the usual problems with long checkout time. But it worked because we tended to version every single piece of software together in a big &quot;release&quot; anyway (to make scientific results reproducable).