I'd like to use LPM only in some windows, e.g. the ones I have open for my shopping with 100 tabs open. At the same time, I don't want my other window with a Google Slides presentation I'm working on to blank out, or the browser-side VSCode.
It would be nice to either "override" the app-wide LPM, or to be able to enable them per-window, with a button to activate it on all windows. I would definitely avoid it being too granular down to the tab or something like that because that would just get confusing.
A small UI hint somewhere to show if LPM is on for the window would be nice too, e.g. next to the window "drop-down" next to the window management buttons on the top bar
Basically some level of management would be nice.