Maybe in theory, but not in practice. Because no ISO fs implementation has support for writing to a mounted image. I'd argue that even in theory the immutabili

Maybe in theory, but not in practice. Because no ISO fs implementation has support for writing to a mounted image. I'd argue that even in theory the immutability is kind of a property of the image format, since it doesn't have file or free space fragmentation. So whenever a file grows or shrinks you have to regenerate the entire image.