Against 3x Speed
Article is about experience but in terms of learning, I find listening to the same subject explained 3 times, preferably from 3 different talks, at 3x speed is vastly better at retaining info. Repetition helps. And there's something about listening to people talk faster inbue qualities of competence that makes me pay attention more. Somewhat related phenomenon, a lot of comedy podcasts, I can't listen to at 1x speed because people talking at 2x simply sounds wittier / snappier. Have been disappointed by more than a few live shows.