Topic.

I usually run Pico-8 maximized (but not full screen) so I can move between windows and tabs more easily. It's mildly annoying to have to find my mouse again because I moved it onto my main screen, and Pico suppresses it when I'm going for another window.

Might be very useful

I see your point, but in the mean time, there's lots of ways around the problem. For example, on windows, you can set the control key to highlight the mouse with a circle . The circle is shown even when the mouse is invisible.
https://support.microsoft.com/en-us/windows/find-your-mouse-pointer-fast-dbc1d222-778c-da15-5218-cb8336074554