I own a 7 series that has both, touch controls and the iDrive knob with physical controls. I mostly use the physical controls because BMW's user interface works

I own a 7 series that has both, touch controls and the iDrive knob with physical controls. I mostly use the physical controls because BMW's user interface works quite nice with it and the physical controls are positioned where the driver's arm is resting, making it kind of natural to use. Touchscreen requires more leaning towards the screen, making it impractical to use while driving (of course, always be cautious while interacting with your infotainment while driving).