Comment by TeMPOraL

> I wonder how many of these (or the Google style guide rules) would make sense for a project starting today from a blank .cpp file. Probably not many of them.

That also depends on how standalone the project is. Self-contained projects may be better off with depending on standard library and popular third-party libraries, but if a project integrates with other internal components, it's better to stick to internal libraries, as they likely have workarounds and special functionality specific to the company and its development workflow.