As an engineer at Google, this comment is correct. Some teams use it, but since most the development happens on Linux desktops, and not Macs, therefore Homebrew

As an engineer at Google, this comment is correct. Some teams use it, but since most the development happens on Linux desktops, and not Macs, therefore Homebrew is not as commonly used as normal dev shops. Basically the internal dev environment is already fully complete and works great. It's ultra custom and there are strict rules about bringing in open source code. The AGPL and GPL3 are good, but also one has to be wary about them in a commercial environment.