Pretty soon the former clear channel frequencies will become nothing more than graveyard channels.
The other day on the 1530 thread, I indicated that the WCKY nighttime signal isn't quite as good after they flip to their nighttime pattern. This is at sunset in Sacramento, which is generally at least two hours after sunset in Cincinnati.
"Back in the day", before the channel was opened up to all the class D stations operating at night, the difference in reception here in the Chicago area between WCKY at night with or without the DA was pretty much non-distinguishable. There was less juice coming this way, but nothing of consequence to degrade the signal.