On Sunday, 28 February 2016 18:19:36 UTC+2, Dave Nadler wrote:
On Monday, February 22, 2016 at 8:19:05 AM UTC-5, Surge wrote:
Using knobs makes it much faster to make selections (beats
pecking at buttons with arm out-stretched as in flight).
Knobs cost more and present mechanical challenges, but are
quicker and much easier in turbulence...

....and setting the volume should be always done with knob, there is simply no excuse for making volume adjustment in any other way.