Well, I can only say that I recently purchase a bamboo blend batt. I took it out of the package and was impressed at how pliable and soft it was. It is very low loft so I will probably use it for a wall quilt or quilted vest, etc. Some scraps will probably work for machine trapunto.
I like 80/20 just fine but am a recent convert to the wool blend batts. The Tuscany wool is so soft, light and isn't crinkled to death in the package. I plan to stick with this over the 80/20.
I look forward to hearing from others who have actually used it.