Very cool. A couple questions: is the song really the right vehicle to pass around? By analogy isn't that like moving the binary instead of the code? I understand the lack of DAW cross-compatibility but it seems like you might need all of the components that make up a song along the way in order to work on a subsequent task.

It looks like this is still in the experimental/conception stage. Right now it seems more like a mental model for music than actual tools. I'd be interested in seeing what analogies besides code would be applicable or might have lessons learned. For example, I know that collaboration and sharing of mechanical engineering design software is relatively less useable/mature than sharing a git repository. For artists that collaboratively work on 3D models or images I'd imagine that the workflow is passing around .psds or whatever, rather than final images because everyone is on the same platform.

I'll be paying attention as this develops.