Lots of ideas are patented, especially by large companies. Some ideas are pursued by the company themselves, while others sit in the patent war chest to (maybe) generate passive income and help with future litigation. Very occasionally they are used for prevention.
Regardless, such a system would be a reason for many people to avoid buying a particular car or brand of car.
I don’t know about these days, but I remember making a custom layout for Windows back in 2005 that was US Qwerty keyboard plus AltGR+auose for äüö߀ (German umlauts and euro symbol).
I forget how I did it, as I haven’t used Windows for serious work in years.