I think the more likely benefit is that pretty much every engineer knows git, it has become the de-facto standard even if other alternatives like Mercurial are

I think the more likely benefit is that pretty much every engineer knows git, it has become the de-facto standard even if other alternatives like Mercurial are easier to learn and use. In terms of onboarding new engineers, this probably saves them a week where new engineers don't have to ramp up on a new technology. It might make a difference in terms of recruiting new engineers. In terms of understanding their customers, I'd guess that a significant number of customers are using git. It probably also makes it much easier to open-source code.