It still is.Top-40 deejays have been doing “framing” for as long as I can remember. They were doing it back in the 1950s and ’60s, long before the internet, digital audio and file-sharing. But the trick was to talk right up to the moment the vocals start. “Stepping on” the singer(s) was considered unprofessional and bad form.
Clever framing is what made the DJ's reputation. I kinda liked it. But yeah, it's very bad form to have the patter spill over onto the vocals. I don't mind framing at the end of the song, either, as long as they didn't cut the tune short.
This discussion reminds me of the Tom Petty song, "The Last DJ". If you grew up with it, you miss it, now. If not, you probably hate it. It was part of listening to the radio.