IMO There is a very good posibility that the 3/2 locomotives/units can be produced at the cost of either a 3 rail or 2 rail locomotive, and eliminates the need to set up a special production for limited two rail units. Hobbyist are either two rail or three rail, not a lot of change from one to the other. IMO
Usually switch (turnout) continuity problems are with the center rail. It's unusual to see an outside rail problem, but the 3/2 has the ability with it's isolated wheels to create that problem. The Decapod that I pictured has been a solid, trouble free runner.
I've also done an Atlas 6924 relay upgrade to my layout that has solve dead spot problems. Surprisingly, Jack, my Weaver E8's with pick-up rollers 14" apart could find back to back turnout dead spots.
Interesting discussion
Mike