Listen to this man right here Also AnulphaR and Metropia can be done (with patience!).
Not sure why people say its a dead technique. Download a few ghosts for any of the tracks mentioned (or Yeldars ghost pack) and you'll see its far from a dead technique.
Though I 100% agree with everyone who said its not the main thing to focus on. A successful bsb is nice, but the shortcuts, best racing lines, boost-brs and shift-brs are easily a more valuable asset for you to learn. Try using SL to learn the BRs, and then TT to execute them