[The Chief (tm)]

2016 2SS: in the warmer weather you can *definitely* notice when you're running seat ventilation vs. not, though ours is a convertible so this might overstate the effect.

Dual-zone very helpful when significant other is in the car.

Heated mirrors helpful.

Backup sensors helpful.

Safety warnings helpful, and configurable so not overly intrusive. (I think I allow certain warning lights to flash, but have disabled the chimes.)

Wireless charging maybe helpful though I haven't used it.

Is the dashboard info screen still bigger on 2SS, or the same these days?

Bose nothing special AFAICT.

Bottom line I don't think I could go "backwards", now having had this stuff, but it's also mostly a DD which comes into play. If yours won't be DD and/or you haven't already had it all on previous cars, then I do agree that the extra $ might not make sense.