No functioning radio in any car in the US is "obsolete" as long as it gets 88 to 108 and 540 to 1600 or 630 to 1700.
Since the average car on the road today is just a month or two under 11 years old, it will take a long time before software driven radios with band modification capabilities are in even half of all cars.
Of course, with 2/3 of terrestrial radio listening taking place outside the car, we know that it will take even longer to get any kind of expanded band penetration there. Very few home and work type radios are software re-configurable.
I'm sorry but I don't understand your first sentence.