No, the other half is getting people to use the product. It's easier if you can make it seamless and bake it in rather than a third party solution. They probabl

No, the other half is getting people to use the product. It's easier if you can make it seamless and bake it in rather than a third party solution. They probably wanted to own the solution to leverage any trust they have with their customers. It's the same thing that happened with backups, they came up with Time Machine. Pretty much all the Mac users I know have a Time Machine backup. I believe the same thing will happen with version control once Versions support is wide spread. Normal people will know about keeping versions of their work rather than multiple differently named files.