Some reasoning why somethings do not initially work as well on Tesla as other cars.
Items like HUD, Auto headlights, Auto windshield wipers, stalk turn signal/horn/light flashes, horn, sound systems etc all were being purchased from other companies. This made Tesla very supply chain limited if these suddenly became unavailable from their respective suppliers.
Tesla is wanting to distill their cars down to where autopilot FSD will be a chief differentialor of their brand.
They hate paying their competitors, like Mercedes, to provide turn signal stalks. They know the future is AI, and that will be the ultimate answer to all these buttons, switches, knobs, levers and controls. Better for them to be integrated into the brains of the car, so they can be accuated by voice, glances, hand waves or simply thought.
As time goes by, others will realize that Tesla is far ahead going down this path.
Their cars will ultimatesly be simpler, less complex, more automated, less restricted, more efficient, cost less and be far quicker to assembly.
They are simply the future