I love my ST, and I'm a diehard ford guy, but if all the tech I was expecting to have was suddenly not available, I would jump ship. My previous explorer, an 18 sport, had everything my ST does, but I would be pissed if I paid more for less of a vehicle.
The only tech I lost on my 21 that I care about is the heated windshield de-icer. That was a 20 only thing.