Let me correct my statement: The 55+ MUSIC audience has moved on. Most 55+ that listen to radio are listening to Talk.
That's just not true. You are developing a habit of making statements not borne out in fact.
I took one market with a very successful AM talker... Los Angeles In 55+, that station is, in fact, #1, but with a bit over a 10 share. Add all the other spoken word stations, like KNX, KABC, KPPC, etc., and talk has about 30% of all listening.
Music stations are responsible for 70% of 55+ listening in LA. AC stations, Classic Hits stations, Spanish AC stations, and one and on.
Then to New York, the leading talker has just over a 6 share in 55+. The all news stations have 19 shares, and sports has 7 shares. The other talkers have a few shares, too. But overall music stations get two-thirds of the listening.