Thanks for your great work on materiel shell : never seen such advanced desktop with amazing features !

At my point of view, it would be perfect with a supplementary level : group of workspaces.
In the video about spatial model : https://material-shell.com/#spatial-model, I would like
that "Workspaces" become "Groups of Workspaces" and "Applications" become "Workspaces" ...
This would also allow to come back closer to gnome : horizontal bar and horizontal sliding between workspaces ;-)
(a little bit like in Matrix workspace extension)

Thanks for reading my thoughts