Yeah, for this exercise I was approaching from the listener view. And while they may not be doing the research, as an example, I have a hard time telling the difference in the music, notwithstanding that the music always evolves. Christmas by and large sounded the same to my ears, musically. Maybe it wasn’t. But not being in the target demo, I may be missing some important nuances.
It's subtle, but involves both the station promotion and adjusting the library and the rotations of individual songs frequently. A song that was, for example, right on the border of a higher or lower rotation might have been put into the higher category... but 3 months later, if it tested lower due to a bit of burn, it would be lowered.
Other songs may have to be rested as they became very marginal. Other songs, against the target ages, may enter broad acceptance as years go by. Or a song featured in a TV show or even in a commercial may get higher than normal scores.
And the rules on blending softer, medium and more up tempo songs may have to change to match the latest test. Using factor analysis we find which songs are less liked by certain subgroups of listeners and they are coded to not play too close to each other.
All this takes research, and then a skilled programmer who can take into account all the "evidence" and make the station sound good to all the potential listeners.
Contesting is noticeably different, sure. Apart from the morning show staples, mostly the standard national text to win contests. Even "Best Christmas Ever," while local so far as I can tell, moved from multiple call-in prizes per day to a text-in prize per day.
An AC station is by nature not "active" and listeners need to be reminded and even incentivized to keep coming back.
The weekenders are gone for the most part, and they filled the midday slot in a couple of different combos since last spring. If nothing else, they didn't drop it entirely from a personality standpoint.
This is what happens when sales background folks dictate programming. True, nights and weekends don't sell a lot. But if your regular listeners find the station less "nice" to listen to if they listen in the evening or on Sunday afternoon, they may not be back on Monday or the next morning.
It's just interesting, and the pandemic would, I think, skews things to some degree. And perhaps it's death by a thousand paper cuts. All little things adding up to big results--and not in the good way.
You are right that this is the weakening of all the strong points of the stations, making it go from excellent to adequate. But the station owner is famous for accepting mediocrity.