Well since you bring up heated seats, the TM3 does not turn on the heated seats automatically based on temperature / butt-in-seat and changing it requires 3 touchscreen taps, two of them high-precision taps, where as the Volt has simple tactile controls. Though I will say the Volt has some of the worst climate control UI I've ever seen.

Similarly the defrost is not automatic and the button requires a precision tap.

There are a couple of reasons you might need to actually use the controls in a car with some regularity.