After the version 10 update, we users can just edit 50 notes at once. And, while editing, it is not able to make another change in the program.
However, the editing process could cost lots of time. If there is a notification (with sounds) when editing is finished, it could be nice for who need bulk editting.
(I always let it work in background to keep from waiting, but it is easy to forgetting the running process.)