Automotive grade controls are pretty expensive (it's not unreasonable to expect them to be operative from -40 to 140f, UV resistant, dust and vibration resistant, etc.), and as with all hardware, BOM cost is king. Even if the button can be stolen from an existing design, it still costs real money, and adds manufacturing labor costs.
The button then has to be tested, and kept in stock for service purposes. What if the button has silkscreen printing on it? It might be the same hardware button for the traction control and the trunk open button, but now they are different SKUs because the label is different.
So let's say I can eliminate 10 $1 buttons (that is an extraordinarily cheap button) by moving functionality to a touchscreen that is going to be in the car no matter what. I reduce the BOM cost by $10 per unit. That's a bunch of buttons that also aren't going to have warranty issues either. The wiring can all go straight to the head unit in a single bundle as well, and there are ten less connections for the assembly line to make. If I do that on a popular platform like the Corolla selling 750k units per year, I have just reduced expenses directly by 7.5 million, plus the cost of install, and simplified the supply chain.
Automotive grade controls are pretty expensive (it's not unreasonable to expect them to be operative from -40 to 140f, UV resistant, dust and vibration resistant, etc.), and as with all hardware, BOM cost is king. Even if the button can be stolen from an existing design, it still costs real money, and adds manufacturing labor costs.
The button then has to be tested, and kept in stock for service purposes. What if the button has silkscreen printing on it? It might be the same hardware button for the traction control and the trunk open button, but now they are different SKUs because the label is different.
So let's say I can eliminate 10 $1 buttons (that is an extraordinarily cheap button) by moving functionality to a touchscreen that is going to be in the car no matter what. I reduce the BOM cost by $10 per unit. That's a bunch of buttons that also aren't going to have warranty issues either. The wiring can all go straight to the head unit in a single bundle as well, and there are ten less connections for the assembly line to make. If I do that on a popular platform like the Corolla selling 750k units per year, I have just reduced expenses directly by 7.5 million, plus the cost of install, and simplified the supply chain.