@matt I don't think it'd be the case that more people will use ferment and not use other applications.

If you think about the current state of the oldernet, many people use Twitter AND Soundcloud AND Github, so why wouldn't they also use ferment and {work, bay} at the same time?

It could also be that people will come in reverse in the future, where they get hooked on listening to music on the distributed Internet and then decide they want to see what's going on in the git-ssb world!