Radio is an older medium and is great at reaching 50 plus. This is where the money is. Forget what you have been taught that in radio the money demo is 25-54. It's not!! Try to find one person who is 25 years old that listens to radio exclusively You wont.
I'm afraid you're right. If you're not right today, you will be in 5 years or so.
It only gets easier to ignore radio. It's been said that the average age of a car is 11 or 12 years. Well, Bluetooth features have been common in cars for 6 years now, or more in certain makes. So that turnover is going to be complete soon.
The "whole house speaker" is only just taking off, and none of them include a broadcast tuner.