In theory it should allow fine grained control over raid levels at the file/directory/subvolume level. So that depending on the specific needs you can set direc

In theory it should allow fine grained control over raid levels at the file/directory/subvolume level. So that depending on the specific needs you can set direct/raid1/raid10/raid5/raid6 without having to setup different arrays for each level you want to use and then have to manage the relative space between them. I can imagine uses for that but the reliability of the more tested solutions is much more important.