I think the big issue is in a majority of vehicles, UI/UX is nothing short of atrocious. Navigating menus can often be totally unintuitive, even for techie user

I think the big issue is in a majority of vehicles, UI/UX is nothing short of atrocious. Navigating menus can often be totally unintuitive, even for techie users - now imagine older folks attempting to operate these while driving. In this case, if you can't do it right, it's better to not do it at all.