I remember when FM radio was not much of a commercial enterprise. It was almost considered "underground". We had a couple of great rock stations here. They really had no format or programming. Back in the days when everything wasn't divided into genres and sub-genres. Whatever DJ was at the helm just played whatever they wanted to play. I remember a local newspaper columnist used to complain about a DJ burping on air. Sometimes they'd play an album cut, and then the rest of that side of the album would play, and then there'd be an hour of silence, because...the DJ fell asleep? Or is doing who knows what?
Back then, we also could get this cool Mexican radio station at night, because the Mexican government didn't control how many watts a station could transmit, and their transmissions would overpower weaker U.S. stations. Z Z Top made a song about it: