At a guess, cost.
Broadcast Radio survives/survived because it could be received over long distances without the need for infrastructure to support its delivery at point of use and without the need for expensive equipment to do so. That and you can receive it on the move. In 2024 the forecast spend on radio advertising in the U.S. is expected to be $12.48 billion, people are still listening at home, at work and on the move.
Also wifi itself relies on radio waves to function as do other RF reliant technologies like phones (smart and dumb).
(, Wed 15 May 2024, 13:56, Share, Reply)