At large companies with developer experience teams, it can be nice. You setup a singular repo (or even several), use a cross-language and cross-platform build s

At large companies with developer experience teams, it can be nice. You setup a singular repo (or even several), use a cross-language and cross-platform build system, and you can get a lot of gains. You can make sweeping code mods too and update your customer’s libraries for them. It makes working in all the languages mostly consistent, and provides a nice platform for optimizations like only testing code which changed. I think the mistake is smaller companies adopting it without understanding the large amount of investment it requires. If you have a mono-repo mostly in one language, and you hire someone who is going to work in another language then you could be in for a world of pain. Unless you resource the language support.