Question

There is a Collapse All Tracks, but no Expand All Tracks.  That is a problem indeed.  Also, Collapse All Tracks is misnamed, as you can't collapse a track, only folders.

Importantly, the new commands for Hide Unused Tracks and Show Unused Tracks, while great and were long needed, miss items in collapsed tracks.  I don't see this as a feature.  I was hoping for Expand All Tracks so I could write a macro to get around the above limitation.  The macro would, Expand All Tracks (folders really), then unhide or hide tracks.

Answer 1

I created a Keyboard shortcut to the "open folder" command.  (Studio One/Keyboard Shortcuts - search for "folder")

Select all tracks

Hit the shortcut

All folders open/close

But there is a limitation - it does not support nested folders.  It will only open the "outer" folder.

Maybe write up a Feature Request?

If you are comfortable writing a macro, you may get what you want by making it recursive.