Comment by atoav

As a fellow Eurorack circuit designer and university teacher on thst issue one immidiate issue I can see is one of practicality. Decent potentiometers are maybe a Euro per piece if bought in bulk, they have a start and an end which is nice and for analog gear you have direct control over the parameter, with very clear feedback what is going on — that is the main reason people want physical gear. So add in a LED ring for visual feedback and endstops.. Might be nice for a digital module.

But even then I'd wonder if it worth it, because of the high pcb space usage. With potentiometers as attenuators or attenuverters you can fit two pots next to each other in a space of 20mm which neatly aligns with the standard panel widths. Theoretically you could certainly get smaller with thst solution, but the hall effect IC needs to be accounted for as well. With existing pots I can use the space underneath. If your module is just 10mm wide that space is pretty premium..