Original post: pop-os/shell#142 (comment)
As for how to implement this feature, here is what I've done myself. First, enable a static number of workspaces (e.g. 8 or 10):
gsettings set org.gnome.mutter dynamic-workspaces false
gsettings set org.gnome.desktop.wm.preferences num-workspaces 6
Then unbind all the GNOME default keybindings for switching between applications:
gsettings set org.gnome.shell.keybindings switch-to-application-1 []
gsettings set org.gnome.shell.keybindings switch-to-application-2 []
gsettings set org.gnome.shell.keybindings switch-to-application-3 []
gsettings set org.gnome.shell.keybindings switch-to-application-4 []
gsettings set org.gnome.shell.keybindings switch-to-application-5 []
gsettings set org.gnome.shell.keybindings switch-to-application-6 []
Rebind them to switch between workspaces on Win + number:
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-1 "['<Super>1']"
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-2 "['<Super>2']"
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-3 "['<Super>3']"
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-4 "['<Super>4']"
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-5 "['<Super>5']"
gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-6 "['<Super>6']"
In addition, it's convenient to have Win + Shift + number move a window between workspaces:
gsettings set org.gnome.desktop.wm.keybindings move-to-workspace-1 "['<Super><Shift>1']"
gsettings set org.gnome.desktop.wm.keybindings move-to-workspace-2 "['<Super><Shift>2']"
gsettings set org.gnome.desktop.wm.keybindings move-to-workspace-3 "['<Super><Shift>3']"
gsettings set org.gnome.desktop.wm.keybindings move-to-workspace-4 "['<Super><Shift>4']"
gsettings set org.gnome.desktop.wm.keybindings move-to-workspace-5 "['<Super><Shift>5']"
gsettings set org.gnome.desktop.wm.keybindings move-to-workspace-6 "['<Super><Shift>6']"