It's rare these days to hear DJ's announce the artists, or songs, that they are playing. Why the F is that?!
It depends on the station and format. I know a lot of stations not only front and back-announce the songs, some even have liners from the artists themselves introducing their songs. In addition to RDS that you mentioned, most stations also have all the songs they play available at their website, so if you miss who the artist is, you can go back through the music and see the names. Even download the song, if you want. Some stations also have a function that you can input a few lyrics from the song, and it will automatically tell you the name of the song and the artist. It's not the 80s any more. Lots of ways to get the information you want from radio.