I'm a double bassist, and other family members are string players. I think there are problems beyond replicating famous instruments, especially for those of us who are likely to play "lesser" instruments throughout our lives / careers. One is that instruments are actually designed to sound different from one another, and it's up to the player to decide what they want.

When I was shopping for my current bass, I was able to play instruments alongside one another that had noticeably different characteristics, along with different design details such as dimensions, and price tags. There is no "best" for makers to aim for, and among the choices that we can actually afford, there are real tradeoffs that have to be made. A wonderful sounding instrument might have maintenance issues that make it an expensive headache to own. I steered away from those basses regardless of sound.

And there's no practical way for an individual musician to conduct a blind test or compare measured characteristics, though I would absolutely love it if there were. Most players would like to cut through the bullshit and woo.

And don't get me started about bows and their maintenance.

Oddly enough, Stradivarius could not have known how his fiddles would sound today, because most of them have been modernized.