Record repeat is just a simple plugin that allows music discs to be played repeatedly without you having to change it. this could be good for shops. Oh well, just an idea.
The only thing I can see wrong with this after a quick look is the same as fireworks... 24/7 music, which is annoying and it lags the server. But I don't see too many auto firework launchers running all the time anymore.
I agree with space. This could and probably would cause a lot of lag if there was constant music being played everywhere. Not as much as fireworks probably but enough to annoy people. But if that isn't a problem than it seems fine to me but also its more work for Aikar and we put a lot of stress on his shoulders.
This wouldn't cause any lag and is something I actually always wanted. However it wouldn't of been possible a long time ago, but now it is doable. Bug team can add it as a "review later" to look into a way to support this in some form.