I'd have to disagree with this - I've had quite a few devices that have used mini-dins, and they aren't anywhere near as robust. Maybe have options for different sized connectors, but they should all be equal in terms of functionality (a bit like USB-B connectors), and need to be as robust as the current ones. I can think of many times where the simplicity and size of the DIN connectors on MIDI gear has been the difference between 'no worries, I can just about get my arm down the back of this rack and get the plug in' and 'no chance, can't feel where this needs to go'. And DINs are strong enough that you can rotate them to get them to the correct orientation without causing damage.