[FeloniousHam]

In the "enterprise", my experience is that incentives/expertise fight hard against successful integrations of 'best of breed' products. In large organizations, features for developers are (at least minor) headaches for the build team, so they don't get rolled out.

Github has raised the bar on what to expect from an integrated SCM, and others have followed suit, so I don't much value added by specialist vendors. I kind of think of it like car radios; you used to have to replace the factory system with a third party product, now almost no one does. The deck that comes with the car is plenty good enough, plus it has the integration with the steering wheel, etc.