Are there any endeavors to decouple VCS interface from the implementation? An analogy is LLVM, but for VCS, in terms of modularizing the architectural layers. It’s difficult justifying learning a new VCS when popular open source projects and employers select for particular systems. Surely there are tradeoffs, but enabling developers to use a familiar interface such as Git would reduce the friction of adoption, while still providing the benefits associated with a particular implementation that’s suited for the project.