I’m obviously not the OP, but I found this thread because I am wondering if there is a way to switch themes using a hotkey – from, for example, Cybertron to Default. I don’t see a command in the palette that would enable that.
And maybe this is a feature request, but I really wish I could set a theme using a Workspace. The use-case is that when I go into a focus mode, I want a plain-jane theme. When I switch back to “normal” mode, I like my bells-and-whistles theme.