rock music was on the FM stations which ONLY played music, no commercials....
I feel for the last 4 decades the younger people have had a very limited exposure to good music.
We had a great Beautiful Music/Legends AM station in Dallas throughout the 2000s, but they fell on hard times vis a vis advertising, so they added an hour of infomercials during the day. This soon got bumped up to two, then three, then four hours. As you might imagine, this drove the majority of the audience away, and they eventually just shunted music off to their website. Once even that was gone, they went back to their roots and just became a Christian talk station.
It was a good run. They would play all the acts you mentioned and the DJs were terrific. They were elderly, however, and they began to die off. The new blood started cycling in more recent music like Celine Dion and Whitney Houston. Coincidentally (or not), this shift to more 80s and up music coincided with the start of the decline.
I switched over to talk radio sometime around 1970 and never went back until I recently added some oldies stations to my presets. I have been told that I missed a lot of good music over the last 40+ years. But tending bar for 25-30 years exposed me to the popular tunes, by juke boxes or bands.
Yeah. Music changes a lot. The crooners are pretty much all gone, with the big dance bands. I have a soft spot for big band and swing.