Amazing lack of proof for the assertion in the title.<p>That said, dials, and especially jog/shuttle (although this isn't quite one of those), are something that once you've had are annoying to live without. Video editors, music production equipment etc. have them for a reason, and that is you get much more feedback through your fingers making fast but precise changes much more achievable than by other means.<p>Griffin did this before ( <a href="https://en.wikipedia.org/wiki/Griffin_PowerMate" rel="nofollow">https://en.wikipedia.org/wiki/Griffin_PowerMate</a> ) and there have even been peripherals for good old UNIX workstations like <a href="http://en.wikipedia.org/wiki/Dial_box" rel="nofollow">http://en.wikipedia.org/wiki/Dial_box</a> .