I have seen the same phenomenon where I work. However, I disagree with the implication that this is limited to young people. I know of a few people that are 50 and 60 years old, that have been using source control for 30+ years, that didn't have any idea that git and GitHub were different things. Now, they were easy to set right; the concepts are all familiar to them.

My experience with younger folks that have never been outside the Windows world has been that it was a lot harder to make them understand. Young folks with a unix-y background were much easier.