'STW has always been an "adult leaning" CHR. That's why you'll never hear rap, etc, but you will hear Aerosmith, Bon Jovi, etc. They've always had a bit more gold in their mix, yet remaining CHR.
They moved to automated CHR because they already had the machine in place ("rocky", iirc) and TM's Stereo Rock had just been developed and was on fire in the couple of markets they played so far. It was a quick and easy way for them to switch. 'JBR was killing them in B/EZ at the time, and their AM (A-C/MOR WDEL) while remaining strong in the market, was showing a few cracks here and there as AM listening continued declining. (Fun fact: all the Stereo Rock stations were branded as "Rock (rounded frequency)". Ex: WMGM 103.7 in AC was "Rock104", while while WRFY 102.5 in Reading was "Rock 102". At this point in time, mentioning exact FM frequencies was not yet standard practice. So, 'STW became "Rock 94 ". That lasted about 2 weeks before WYSP leaned on them to knock it off. Oops. WSTW then became "Rock 93-7". They wound up having to have all the jingles, Johnny borders' liners, etc recut.)
After a year or so of automation, 'STW started a really gradual transition to live programming with joe Dawson running a live-assist version of the format for morning drive. Eventually more live jocks were added, still live-assist, with some (like john Wilson and steve Michaels) moving over from WDEL. They slowly became "Wilmington's Own 93-7 FM, WSTW.
I had the chance to work there in the mid-80's as the first overnighter after they did away with that last automated shift. By that time, john Wilson did morning, Katey hill was midday, steve (Michaels) berstler did afternoon drive/PD, al engberg was early evening, and Brenda (Nicole) miller did late evening/MD.
I don't know about now, but back then, it was a great place to be and learn (I was still a snot-nosed young 'un, and acted like it, unfortunately, getting tossed out on my butt after a couple of years), and I still use a lot of what I learned there, 25 years later, in my work elsewhere.