Didn't got adoption because the code base is awful to work with and there is a trauma against bluetooth being used as a network path.

Plus: encryption is heavy when bandwidth is limited and over radio waves we aren't even permitted to encrypt data most of the times.

Please don't read my comment as bringing down the project. I'm a fan, used everything it was produced but ultimately is unusable for serious applications on the current state. I really tried hard to adopt it.