Wow, I think this is the thing I wished existed for years! Most file formats leave a huge compression opportunity on the table just because their choice of physical layout. (I call the simple case "striding order", idk) But getting it right takes a lot of experimentation which becomes too much churn for applications, and can result in storage layouts that are great for compression but are annoying to code against. So the obvious answer (to me at least) is that you need to decouple physical and logical layouts. I'm glad someone is finally trying it!