If I was sitting with the nose of my sled pointed over a 50 foot cliff and needed to do a really tight 5hit hook to get out of that situation I certainly do not want a 3" track. I would want something that I could stab the throttle and get that track spinning without grabbing and launching the sled forward over the edge. Once a track is spinning the sled will be super easy to pull over and spin on the spot. This is where some guys see the advantage of some tracks over others. Also when standing central on your sled, to spin the track makes it really easy to roll the sled on to one ski to carve a corner. If the track is hard set you may have to jump to one side to get the sled on one ski. SO it comes down to 2 factors, the first riding style, the second snow conditions.
After saying this, I went and ordered a 174 x 3" for 2019 and really hope I don't hate it. The reason I did was because I ride super soft deep snow as the norm. If I was to ride hard packed areas I would definitely stay away from the 3" track.
BTW the Polaris 2.4" track is still an awesome "light powder" track and is very durable.