Earlier quoted context omitted.
I'm a semi-professional violinist who got to borrow a Strad for a couple months and whose long-term teacher has the lifetime loan of a del Gesu (and has had access to a Strad but prefers the del Gesu!) I don't have Studies to back this up, but anecdotally: * Playing fine violins takes a lot of practice with the specific instrument to begin to unlock its potential. I was scratching the surface after a couple months; p…
Humans are all subject to cognitive biases. Musicians are no different. That is why controlled testing is the only way to determine if these extraordinary instruments actually produce extradordinary sound. Wouldn't you like to know if you could sound just as good on an ordinary instrument? I imagine a lot of money could be saved and and a lot of stress could be avoided.
Anyway everyone who uses one of these still has their "normal" (masterfully crafted modern) instruments for when it's the more practical choice.