Years ago there was a startup called Splice here in NYC where the original product was basically just that -- version control and collaboration for Ableton (and maybe other DAWs?). I remember having an interview at Union Square Ventures for a role there and a couple of the partners asked me about them as they were an investment, and I really couldn't see a viable business in it the same way GitHub was for git. I brought up the storage costs as well.

I just looked them up and it seems like they're still around and pivoted to a learning DAW and a plugin marketplace.