Bachus has described himself as a serious hobbyist and that's great. That means that he is much more likely to push the technical envelope than your average pro musician who is probably leaning much more towards the (purely) musical side of things. So if the question were "who is more likely to push manufacturers for newer and more spectacular features, the musician or the technophile, I'd say the technophile. Whether or not they would be the RIGHT features to make a true musician a better player is up for question. The musician wants a Stradivarius, the technophile wants a lightweight plastic replica with a built in sampler and an off/on switch.....and oh yeah, it should also have good brass and guitars.

As to the original question, musicianship or technical expertise, I would have to say musicianship; for the simple reason that one can be taught (learned), the other, not so much.

JMO,

chas