> And yes, there are external tools for code review. But that all should be a part of version control.

There are many different code-review workflows, and for teams that do full-time pair-programming, code review happens in real-time as the code is written.

Trying to bake support for all of that into something that is also a good VCS sounds like a recipe for one of those clock-birdfeeder-machete-flashlight-massager tools that you used to see on the back pages of outdoor magazines in the 90s.