Preparing for Quick Share

Hi! Reaching out ahead of the Quick Share release with a few questions.

1. Will existing preview links continue to work as-is (as preview links), if they have been shared with others prior to the update? Specifically, will there be any disruption or changes to accessing content shared via preview link?
2. To confirm, we will be able to create a new Quick Share link for existing courses to view analytics?
3. What are the limitations, if any, on who can view a Quick Share link? (location, etc.)

Thanks in advance!