The quality of the sound is what I'm talking about. His singing will sound the same, and that's what will make it good. :)
You mean all the modern techno-digital-mixer-synthesized-bass-boosted-companded-expanded-echo-chambered-what-ch-ma-call-its can't make Dylan sound any better than he did in 1962?.............
As a voice teacher I can say with certainty that his sound is not "good". It may be distinctive, but it is bad and ugly, poorly produced, problematic. If you like bad and ugly, well, fine, but for a real voice try Thomas Hampson, Bryn Terfel, or Andrea Bocelli (to name but a few of the biggies).