That's my understanding of it. As the manufacturers are trying to move more towards 'green' items... and always more profitable items... I saw the release of powders like W244, W572, and the IMR Enduron line as a way to transition away from older, more costly products to produce, and at the same time get away from waste byproducts and the costly disposal of it. The problem is, they are trying to supplement tried and true powders, with a nearly rabid following... like W231 and, for example, IMR4350. I don't think it's working as well as they'd like to hope.