I wouldn't want this in git mainline. git is a clear, simple file format (with a horrible user space) which makes sense as the back end of far more things than

I wouldn't want this in git mainline. git is a clear, simple file format (with a horrible user space) which makes sense as the back end of far more things than it is used for. I feel like integrating this into mainline is a little bit like integrating a visual database design tool into a database server. They're complementary, but different.