For those planned to install the device now or in future, what about the cars already on the road? Those can be dangerous...
From another angle, it's clear that Nissan, Chrysler, BMW and Daimler are responsible manufacturers, they put human's life first; all others which have not installed the device to save a few bucks are not. How many other unknown-to-public devices which are vital for the safety of drivers are out there, do you think a non-responsible one will install 'em?