Would be cool to have a visual focus (visual solo) mode.
You are working on a plugin and don’t want distractions. So you would toggle on this mode (wherever the button would be) and it would tone down everything else, like a theatre mode.
Here I got Retrologue focused. Push the button, everything else is dimmed.
We could set the amount of dim, or blurred or something.
Or a completely dark (blank) background. Closing the focused window escapes this mode.