He spoke to this on No Longer ery Good, episode 626 of The Accidental Tech Podcast. Time stamp ~1:32:30
It tries, but there are some things it can't perfectly preserve like the last access time. Instances where it can't duplicate certain types of extended attributes or ownership permissions it will not perform the operation.
Well, the FAQ also states that people should notify if you're missing attributes, so it really sounds like it's a predefined list instead of just enumeration through everything.
No word about alternate data streams. I'll pass for now.. Although it's nice to see how much duplicates you have
It tries, but there are some things it can't perfectly preserve like the last access time. Instances where it can't duplicate certain types of extended attributes or ownership permissions it will not perform the operation.
https://podcasts.apple.com/podcast/id617416468?i=10006919599...