Doesn't Shearer drop his wrist a lot more than in the straight-wrist modern technique? (That's what the photos indicate.) And how straight, and also how relaxed, should the wrist be with the modern right-hand technique? Are there a lot of variations among different players? And do some still prefer the Shearer technique to the straighter wrist? Do some find that there's tension with the straighter wrist? Having learned the old technique with the dropped wrist, it's a step overcoming all of the old strictures on the relaxed, dropped (or bent) wrist and the resulting angle with the fingernails. In olden times (the days of Segovia, Bream, etc.), the argument was that the dropped, relaxed wrist eliminated tension and stress and also led to the best sound and best projection. One could even hear the improved projection when the technique was worked on. With skiing, the new technique is based on the new shape of the skis (parabolic). With the guitar, it's based on an evolution of ideas--in fact, maybe one that could eventually revert to older ideas. Curiously, I do notice an improvement in sound with the straight wrist (shattering long-held beliefs about the old technique), and yet sound quality was one of the principal reasons given for the old technique back in the day. Moreover, a lot of teachers have their own different ideas. It's enough to drive one nuts.