Author here. The real motivation: I've been a Rockbox fan since 2010, when I installed it on my iPod and it completely changed what that device could do. The UI, the codec support, the sheer hackability, nothing else has come close since.

I've wanted that same experience on my desktop for years. So I'm basically trying to bring Rockbox to macOS and Linux as a daemon I can use every day, with MPD-style control on top.