I'm going to ask you to remember a lot of similar discussions we've had here, Patrick. I know you can connect those with what I am going to say.
It is a fact, proven by the ratings in many markets, that 80's-based Classic Hits draws a significant number of listeners younger than what is expected of the format. My own "liner reader" Gene Knight experienced it first hand at his last on-air gig at KXSN (Sunny 98.1) in San Diego; he noticed that contest winners sounded considerably younger than the Boomers that were "supposed to be" the core demographic. So he started asking them why they listened, and the answers were all along the same line of thinking:
"The 80's is when all the good music came out."
Without going into detail again, you will remember the discussions about how CHR started to fragment into sub-formats by genre ... mainstream, rock, rhythmic, etc. That has given every Classic Hits PD a colossal headache in terms of which genre of 90's music can be integrated into the mix without turning listeners away every other song. (Remember, Classic Hits is defined as a mass appeal "consensus hits" format.)
A listener whose CHR choice of stations played "Vogue" is, most likely, going to be turned off by "Policy of Truth", "Smells Like Teen Spirit" or "Gangsta's Paradise" ... and vice versa. But the 80's was the last decade where all the genres co-existed.
So those of us whose CHR listening pretty much came to an end with that fragmentation find the mix on KRTH unpalatable.