I said something like this a month or so ago and it got derailed by people who couldn't get the point if they had to, so let me take another shot at it:
If 610 had simply gone dark and had its license turned in in 2005, would your life be any different or poorer today? Don't give me, "well, Family Radio would still be on 106.9....". If 610 had just gone dark instead of changing to Family Radio, would it make any meaningful difference in your listening habits? Today. Not the day after they did that and you'd been listening to the AM 31 years ago.
No. Neither will 560 not coming back on the air.
It's not a shame. It's not something that's wrong that needs to be fixed. I mean, you could argue that Cumulus f***ed up and turned off the wrong radio station---that they should have left 560 alone with its 1.8 and taken 810 and its 0.2 dark, but dear God, this thread would be twice as long if we were talking about 810 being dark for ten months and thisclose to turning in the license.
What happened here has been happening in the Bay Area for 40 years---listeners are listening to AM less and less and less and now---after four decades of the economic equivalent of wind and water, the advertising revenue has eroded to the point that there isn't much to do with an AM signal other than satellite-delivered right-wing talk radio (especially when the same company already has sports covered).
Actually, that was 20 years ago. It's just gotten worse since then---to the point that the highest-rated standalone AM a year ago drew a 1.8. And now, on a stronger signal, the same programming with the same branding draws a 0.7.
An observation from decades in the business:
80% of the people who freak out over a legendary station's format or call letter change are people who haven't listened to the station in at least five years. I've seen it time and again.
"That's outrageous! They can't do that! They're number one!"
"No, they're number 17."
"Well, when did that happen?"
"They fell out of the top ten five years ago. When did you listen last?"
"Um---about five years ago."
If----BIG if----someone came along and offered Cumulus just enough money to transfer the license for 560 instead of surrendering it, what are the odds that what they put on that signal is anything you'd ever listen to for the limited number of years before the new owner surrenders to the inevitable and realizes that there's no there there on AM radio in San Francisco anymore?