Just a few notes then 
* One can now store more data than it is comfortable to make backups of on a morphos machine, yay
Sir, you can always split your HD to smaller partitions. I wouldnt recommend using huge partitions on Amiga.
* If said machine has a malfunction one can not comfortably retrieve the data on another machine, since that machine also would have to be one with registered morphos and icefs on (or, you can do copying for 30 minutes, then reboot, continue etc. if you really need to)
* The filesystem is not mountable or anything from any other OS (as of yet anyhow, when/what and under what iicense is the author "open" to develop for?)
Sir, you can always use other filesystems if mobility is important to you. Ddo you really think that when there is new software everyone go use just because it is possible? Sir, I dont think so. Obviously not many are willing to reformat their HD only to try new FS and of course due to lack of RDB on Macs makes it impossible to boot system from it.