As for "why," your guess is as good as mine. The entire design of the Model 3 eschews buttons in favor of the screen interface, so this likely is another exampl

As for "why," your guess is as good as mine. The entire design of the Model 3 eschews buttons in favor of the screen interface, so this likely is another example of that. In practice, I usually ask passengers before we start driving if they'd like their seat heated, if it's cold enough outside that it's a reasonable question to ask. Window controls do remain physical switches, in the standard configuration (e.g., the driver can control all four windows, and each passenger window has a nearby switch as well.)