I was wondering this - I'd buy this if I could just plug it into my existing sockets. I'm pretty sure you could get 50-100 hrs with a battery, but I wonder if you could have something that you wind-up like a mechanical watch.

Profit margins on eurorack are pretty damn low. And you need a lot of knobs and jacks and plugs. Even a hall effect sensor may be out of the sweet spot for cost.

Probably because pulling on cords can twist them. That’s what I thought when this occurred to me.