It takes real time to get out a pressure gauge and check the pressure on each wheel, no? Furthermore, attention itself is a limited resource.
For example, power windows were always handy when getting on/off the highway and coming up to a toll booth where I'd have to give/take a ticket. It's much easier to hold a button (or even have a latching button) while spending my attention on actually driving.
I have one car with TPMS that's entirely done through the ABS controller measuring the relative diameters of the wheels. That's not a privacy or cost problem. Furthermore the privacy problem where wireless TPMS sensors are interrogatable is better framed as a security vulnerability in their design, rather than something intrinsic.
Weight is a red herring as I'd guess the fuel savings from having properly inflated tires outweighs the fuel spent on the extra mass.
For example, power windows were always handy when getting on/off the highway and coming up to a toll booth where I'd have to give/take a ticket. It's much easier to hold a button (or even have a latching button) while spending my attention on actually driving.
I have one car with TPMS that's entirely done through the ABS controller measuring the relative diameters of the wheels. That's not a privacy or cost problem. Furthermore the privacy problem where wireless TPMS sensors are interrogatable is better framed as a security vulnerability in their design, rather than something intrinsic.
Weight is a red herring as I'd guess the fuel savings from having properly inflated tires outweighs the fuel spent on the extra mass.