GTman: “In order to make a fiber with even close to comparable mechanical properties as spider silk, they were going to need to isolate it which would be way too expensive for garments. This is why they pivoted to "brewed proteins". Because thats exactly what it is. All they do now is do the first couple steps of purifying in order to remove suspended solids and the dead yeast, and then they dehydrate ALL of the proteins secreted by the yeast. They make a fiber with this "brewed protein". But they could also make a fiber without the trace amounts of spider silk in it. It's not hard to make a fiber from any protein, however, it won't have any useful characteristics so you might as well use something cheaper, like cotton or wool.”
You don’t have any evidence to support this claim. The fact that Spiber is able to make a fiber that exceeds high-end fabrics in their look and feel suggests that Spiber is not churning out fibers made from all of the yeast proteins as you argue.
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