No....try not to read past what I've actually stated. It doesn't matter if ZFS has this, or NTFS has that, NONE OF THAT has anything to do with building a new filesystem from the ground up, let alone pulling off the largest filesystem conversion of a user base in human history.I suggest you look through the file systems on this list
https://en.m.wikipedia.org/wiki/Comparison_of_file_systems
Your statement is....interesting from a tech point of view....are you just choosing to ignore what has been released in the last 15 years.....or...are you actually saying that apple's APFS is the most impressive/innovative file system on that list ....
Given how iOS updates work, absolutely nothing amazing about the rollout! That is a red herring, we don't have a choice.
I chose to "ignore" what other filesystems have because it has no bearing on actually creating a new one. You can't just pick a piece of code from the foundation of ZFS and pull it into AFPS (or any other filesystem for that matter) to get that feature, you have to start from scratch when making a new filesystem.