They all survive to be mediocre. They are OK being in 3rd place out of 3 stations airing the same format. It is OK for B96 to be a JOKE of what they once were for many many years.
Meanwhile, you will have WDCB close to a 1 share and WBEZ reaching #1 or swiping at Newsradio. The rest of people have checked out and listen elsewhere instead of voice tracked (if you are lucky enough) jukeboxes with 20 minutes of commercials per hour.