I bought a Stella McCartney blazer a couple years back because I liked the cut, and yeah, the sustainable angle was there even then - but what struck me looking at her newer stuff is that going fully zero-wool is a bigger deal than it sounds, because it means she's basically betting on lab-grown and recycled materials to replace something that's been a fashion staple forever. The thing people don't always clock is that sustainable alternatives can come with their own environmental baggage depending on how they're produced, so it's worth digging into what's actually replacing the wool rather than just assuming "no animal products" automatically means better. That said, if you already care about ethical fashion, her commitment seems genuine and consistent, not just a marketing pivot.