You, of course, already know that classic hits and ”throwback” rhythmic aren't exactly the same thing. With the possible exception of KXQQ, Audacy's other ”throwback” stations start strong and burn quickly. WBMX and KHTP are about in the same territory that got their previous formats flipped, and KRBQ is well below where KISQ was when it became “The Breeze.“
I don’t know how you sustain a format like this indefinitely, but, even burning quickly, The Block may well do better long-term than country had been doing.