There is a company called woolcool in the uk that produces wool sheets to replace styrofoam. The sheets are encased in thin perforated plastic. As as insulator it’s great, but it does get wet and it’s expensive. There are companies using it to deliver temp sensitive goods but if you do you have to get your customers to send it back to you to mitigate cost. No one talks about this and finding out the % of packaging returns is information no one volunteers. So you have to get them to return a box full and they also have to hang it over a chair or something to dry it out.

Strip it out of the plastic and a dog or cat will go nuts rolling in it!

WRT house insulation What happens if it gets wet. Moisture is mentioned in the article briefly but not really addressed properly.

The mushroom product doesn’t have any info on thermal insulation properties. Which is the key market. As someone else mentioned, it’s vague