Rick,
Well, at least I'll know where to find Cousin Brucie! Way back in the stone ages, 104.3 fm was WNCN FM, and it broadcast an all classical format. It was taken over by a group of investors headed by William Buckley (of all people) and they immediately converted it into a top 40 station. Public outcry was loud, especially about the loss of the tremedous library of classical music that the station had amassed which was sold as an asset in order to recoup the cost of the takeover. After a year they reconverted to classical again (and had to rebuild a library of recordings) which lasted for about nine or ten years but the djs who had made the programming so interesting had gone elsewhere and some very rare recordings were gone, so a lot of good programming was lost.
Today it's WAXQ (Q104) and the only classical on it is classic rock. There are no more oldies stations in New York or Miami anymore. Is it because programming was uninspired? I doubt that, it costs more to operate a station with humans doing work than computers and the bottom line is what drives the market.
Viator,
I doubt the size of the pool of music is going to change very much because the format changes. The only thing that's going to change is who makes up the program and I don't see how a computer is going to make something that is repetitious more interesting. If you really like a song, you won't be able to call in a request or look for a playlist to find out what you were listening to (playlists are "unavailable" on jack or bob radio). At least with a dj you had a human voice to break it up, make a few remarks and link the music with the audience. Now, if there's a human voice it will probably only be for station identification, commercials or news, weather and traffic (if they broadcast that).
Publius,
Yes, Austin as one of the greatest music venues in the country has many other radio stations to compete. I found the classical station excellent there and woke up every morning and went to sleep every night to its broadcasts. In fact, one of their more interesting offerings was a recording of Imogen Vaughn-Williams conducting one of her father's works.