No expertise here, just some reflections on necks of differing girth. Violins..? Banjos..?, Guitars, even..? Mandolin..? Double bass..? Cello..?, Electric bass..? All of these and more are to be played in approximately similar fashion by the Human Hand. I doubt that any one could lay claim to being the 'magic bullet' for optimal playing, at whatever speed, in whatever genre. I suspect (with no figures to back it up; just a hunch...) that each of these types of instrument have each a range of 'optimum', depending on fashion, luthier's preference, Buyer's preference, price point and other criteria. If there was just 'one way', all would have the same profile; t'is not so. Where is the 'right' and where is the 'wrong' (as defined by whom..?)..? I would advance that there is no 'absolute' answer. It's a debating point, certainly, but with what possible outcome or conclusion..? The dogs bark; the caravan passes.