Amazon: It's time to quit plastic
As an industry leader, Amazon has not only the ability but the responsibility to move away from the overuse of unrecyclable, single use plastic packaging. Your new lightweight mailers are efficient, but far too often go unrecycled -- or are rendered unrecyclable by their paper labels.
You claim to have "a fully recyclable cushioned mailer that is recyclable in paper recycling streams" in development. I strongly urge you to prioritize that technology, and move away from packaging your shipments in plastic as soon as possible.