To give a specific example, 96Rock tried to expand their playlist with The Safety Dance by Men Without Hats in 1983, but was hit by a tremendous backlash from their audience. A college station like WRAS, who helped make the song a hit, has an audience that wants to hear new music. Burkhart/Abrams weren't stupid - they knew they had to give their audience what it wanted and it wasn't a bunch of guys from London (or in this case, Montreal) with strange clothes.
"Their audience" meaning P1s, which was mainly boomers at the time. Hence the onslaught of deep-cut psychedelia shows like Psychedelic Psunday, Psychedelic Psaturday, and Psychedelic Psupper. Plenty of guys wearing strange clothes, as long as it was hippie wear.
To be clear, it wasn't a bad move by 96 Rock from a commercial POV--at one point prior to this, WKLS had "Purple Rain" on their playlist, and 96 Rock needed to clean that lack of direction up and focus on their P1s. A bunch of us wanted a KROQ clone, and that wasn't going to happen in an under-radioed market like ATL, and certainly not at the only album rocker in town.
WRAS's problem was weak production values--I wasn't expecting slick bumpers, but the DJs needed to engage with the audience more and "play it and say it" in the days before RDS and Shazam as opposed to just spinning records and doing TOH IDs. It made for a rather inaccessible station.
After the CHR doldrums of the early 80s, Z-93 never really recovered. If Z-93 had played more new rock (like Power 99 eventually did), they might have done a lot better and taken some of the pressure off of 96 Rock to be everything AOR. Especially since there was a glut of AC stations chasing the pop boomers at the time--B98.5, Warm 100/99.7, Peach, 94Q, Lite 106, Fox 97--there was no room in that lane. The AC glut and the weakness of Z-93 opened up an opportunity for Power 99 to flip from AC to CHR, which played a lot of new rock and really took it to Z-93.
Z93 flipped to classic rock and doubled down on what 96 Rock was doing, which freed up 96 Rock to play more new rock just as the boomers were starting to age out of the demo.