>>>CBS is holding the KFRC calls, Are they going to use it for classic hit format anymore?<<<
The trouble is, the KCBS-FM call letters are already in use in Los Angeles. I'm sure CBS might want to put the KCBS-FM call letters in place of KFRC in San Francisco, to go with KCBS-AM, but since those calls are in use 350 miles to the south, CBS simply kept the old call sign for the FM All-News simulcast.
Same in Chicago. CBS has an All-News duo with WBBM as the historic AM call letters. But they can't make the FM station WBBM-FM, since those calls are already on CBS's Top 40 station in the same market. So CBS has kept the old call sign, WCFS (which stands for Chicago's "Fresh," a handle CBS uses on some of its AC stations). The AC format is long gone, but the call letters remain. Just as in San Francisco, the Oldies/Classic Hits format is gone but the KFRC call letters remain. Both All-News operations are identified by the AM's heritage call letters.
When buying a station or changing formats on an existing station, some owners immediately pay the $200, or whatever it is these days, for a call sign change. Some keep the old call letters, figuring they can live with them, or only using them for the legal I.D. How many formerly Easy Listening stations still have "EZ" in their call signs? I have to laugh when I see a Hard Rock station, like KEZO Omaha, keeping the old call letters refering to EaZy Omaha. Or how about Classic Rock WHJY Providence, which was once an Easy Listening station calling itself "Joy." There's nothing easy or joyful about those stations today. But I'm sure hardly anyone remembers what the call letters once stood for.