Really? I have yet to see one. Every single Blu-Ray I've ever seen had some amount of compression artifacts and some actually much worse than SW; for example the BD of Aliens has loads of compression artifacts, as does The Godfather, though it's usually due to a more grainy nature of the film, plus 16:9 framed films are generally harder to compress, because with 2.35:1 or 4:3, the black bars compress very efficiently, so there's much less actual picture resolution to compress. And yes, they definitely used double layer BDs for SW.

Now, I'm not defending the SW BDs of course, we all know they're pretty awful and have many shortcomings but bad compression simply isn't one of them.

Slightly off topic; that's why I always say that we don't need more resolution for home video (if 1080p/2K content is good enough for most of today's cinemas, it sure as hell is good enough for home screens, however big,) what we really need is the same resolution with less compression. I think having 4K content at home is laughable - it's the same kind of marketing trick as 1080p smart phones - they should employ the new more efficient compression algorithms to get lossless 1080p into homes, not lossy 4K. 4K TVs are a different matter, because at a certain size, you begin seeing the grid of the TVs pixels when it's just 1080x1920 but you don't need the content to be at that resolution in a home environment.

EDIT: To avoid derailing the thread, please continue any discussion of home video future and present here.