In short, it seems we might be looking less at the story of a lone master luthier and more at a carefully managed enterprise built on marketing claims, polished promotion, and a strategic approach to image.
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The sound is massively processed on all of his videos so there's no way to know what the instruments really sound like and per Tarisio, he was an artist in Brazil, then a lyre luthier, and then switched to violins and moved to Cremona. His own website says it only took him 3 years to be able to open his own shop and now sells "masterpieces".
He is clearly good marketing and self-promotion, but at $50K+ USD per instrument I'd expect him to be a lot better known than he is.