It's disappointing that all the comments are so negative. This is a great idea and solves a real problem for a lot of use cases. I remembering years ago Facebook says it had this problem. A lot of the comments were centered around that you could change your codebase to for what git can do. I'm glad there's another option now.
It's because the 'problem' it solves is a corner case that's rarely encountered. I love their absurd examples of repos that take 12 hours to download. How many people have that problem, really? All they did is create a caching layer.
If you deal with graphics, audio assets, etc, the binary-blob type of data, the case is central.