@mib2berlin you can see there's no any indicator/marks on the left of every workspaces in this list in your screenshot.
E.g. you opened some pages in [default workspace] and [Info] workspace (there would be more in actual working) for work, and the [News] workspace are under hibernated.
There should be some indicators or marks to help us quickly identify the active/running workspaces.
Pros:
It would be helpful for us to identify and release more RAM from pages for doing another things;
I can quickly select the workspaces I m currently using in expanded list of workspace.
How do you think?