I would agree for all of them. But, from personal experience - productivity dives down really badly the moment code base have grown in size considerably. Addin

I would agree for all of them. But, from personal experience - productivity dives down really badly the moment code base have grown in size considerably. Adding more people makes it even worse, since most of these people start to come in with a very fresh language knowledge ("oh, Go is simple, you can pick it up in no time --management"), and you have to babysit each merge request carefully. Which makes your productivity worse, mgmt adds more people, you miss things here and there, and code quality goes down.