When it comes to KMXV, it tended to evolve slowly from AC KLSI to a hotter and hotter AC until it became Mix 93.3. A year or two after becoming Mix 93.3, it changed calls to KMXV. “It's 11:00 at KMXV Kansas City, where MX stands for 'Mixed' and V stands for 'Variety'….”
When it went from Hot AC to CHR in 1994, it was a dance heavy CHR. After a few staff changes and its main competitor left the format, it started mainstreaming and maybe even leaning a little more adult. That was really when the ratings started going up.
Over time, KMXV has evolved to suit the tastes of its target audience and to adjust for new competition it has received. As an example, in 2001, it dropped its all request 80’s lunch after KFME 105.1 launched with an 80’s heavy hot AC format. That's standard for most stations. Whether they intend to do so or not, they adjust their music and their presentation to appeal to their audience. As members of the audience age into and out of their demos, they will play songs those people like. They won’t be the same songs nor the same presentation.
Another good example of that is 94.9 KCMO. It changed its name because Oldies 95 was the station my parents listened to. It had many of the same jocks it had even going back to the 80’s when it was CHR/Top-40 KCPW Power 95. It had to completely change its image and music mix, however, to get those of us who were Power 95 listeners as teens to go back.