restoring ng 21.5 onto ne nightly threw an error on screen - doesn’t seem fatal. Didn’t get a chance to write it down but it was about boot.hint being missing if I recall correctly.
remote.conf is wiped, you need to manually put that back on.
sources.xml and passwords.xml were not migrated
Apologies
This reply reminds me of SpongeBob SquarePants
2 years Later !!!
I did notice that - but the thread is about using the backup process. I thought it was the best place to report it not working right.