My home is connected with a mix of X-10, Z-Wave, Insteon, ISY, Echo, and Philips Pronto. Unbelievably, thanks to ISY and a couple of Raspberry Pis, everything works.
I hired someone to redo the bathroom and specifically requested either extra deep boxes, or use of junction boxes to join lines - not the switch box. Naturally, I now have 3 lines plus 4 loads coming into a 4-gang box. That rules out my stash of X-10 switches - they don't fit. And it's too late to change. Yes, mea culpa, I didn't inspect the boxes.
Does anyone have a recommendation of a switch, compatible with ISY, that will fit in a very tight box?