It's not about their age, how long they live, or how much money they have. It has to do with how receptive they are to radio advertising.
If you have statistics that demonstrate that boomers have become more receptive to radio ads, let me know. From what I see on this board, they haven't.
There comes a time when most people have their "stuff". Not that they don't buy anything, but it generally isn't furniture and what is needed to set up a household (unless divorce comes later in life. For every well-to-do boomer, there are 10 who don't have a dime saved for retirement.