Maybe, but I think most developers are fine jumping to another tool if it makes what they do every day easier or faster.
Our goal isn't to replicate all the commands git can do. It's to try to create an interface for writing Git commits/trees that fits a more typical workflow. The UI is pretty different, but the end result is the same. If we can do that _faster_ than you can do on the command line or with another GUI, most developers are pretty pragmatic and will consider it. That is to say, if we do it well.
