Love to have grey folders on the left pane too! This would help organize our drawings and I'm sure AI could help assist with this as well.
Here is a 2 min video on how wonderful this could work. LINK

i like it.
would be cool to temporarily sort by different variables ex. area in a building and group Arch Mech and Plumbing drawings for same section of a building.
or being able to create custom, project specific grey folders based on search parameters.