Previously when someone was given access to a shared drive, they would maintain that access for all of the contents of the shared drive. As a result, we encountered hesitation of moving data to this model as there were often times content that was related to the team/project, but not intended for everyone's review.
With this change, sub-folders of files can be set to a limited audience that should have access to this subset of info while limiting the full team's access. As a bonus, non-team members can also be added to these Limited-Access folders allowing for further customization of who should have access to these files.
This is a pretty good explainer video starting at 1:58