"Nashville Now" was more than a showcase for current performers and their current hits. Many shows featured veterans of the business whose hit-making days were done -- Roger Miller, Jeannie Seely, Jack Greene, Jimmy Dickens, Donna Fargo, etc.
A lot of TNN shows were geared around that. They got who they could get. TNN was partly owned by the Grand Ole Opry, so they had a lot of shows with Opry members. If you go to the Opry, the audience is mostly 55+ except when Carrie is there. The Circle Network today is very similar to the old TNN.