npm install a thing with multiple clients. Um, huh? Where did that come from? At best now we have 2 competing man page systems, one for the "complete" information and one for the examples section? This is crazy, surely? You're not going to be able to stop using man pages! A replacement that can't be a replacement.
But sadly the examples themselves will probably have licensing problems to be able to be incorporated as documentation patches to the man pages - I hope I turn out to be wrong about that.