Since apfs, “large” empty files can also take only the 4K or so for the fs entry on disk, gotta make sure it’s not a sparse file, and doing so is a bit tricky,

Since apfs, “large” empty files can also take only the 4K or so for the fs entry on disk, gotta make sure it’s not a sparse file, and doing so is a bit tricky, better to fill it with junk that doesn’t compress well.