I don't know because no studies have been done about the so called good engineering practices. If a big company with 10 teams of 20 engineers each blogs about

I don't know because no studies have been done about the so called good engineering practices. If a big company with 10 teams of 20 engineers each blogs about how they're able to ship good code with testing or source control, I won't be any more fascinated that I am here because it sort of makes sense since no one can prove that source control or testing improves the end product.