It would be useful if there would be an extension cable to connect two Grid modules with each other for situations where it’s not feasible to connect them directly.
I use my Grid controllers in a very space constrained situation (basically a pedal board but with synths) where each centimetre counts. It needs lots of Tetris thinking, angled (DIY) plugs etc. The smaller and flexible each component is, the easier it can be integrated into my setup. In this particular case I use the Grid to control the 1010music bluebox. This means that I have to connect the controllers to each other because the bluebox can only host a single MIDI controller via USB. DIN MIDI isn’t an option because it would complicate things and degrade responsiveness.