You have the ability to let me share my XD cloud docs with other designers, why wont you let me do that in bulk (select multiple files at once and then share). Also why can't I share at the folder level?

Use case:
I just lost a document because one of my co-workers left and didn't share/transfer ownership before her email was disconnected. I am now sharing all my files so that at least my co-workers have access to what I am doing for now. What happens if I was to leave? Are those files gone forever even though I shared them?