Unless Lightroom is fully maximized, clicking the little arrow under the filmstrip to either reveal or hide it usually results in me selecting something on my Windows taskbar instead. It's too small and should be repositioned above the film strip or elsewhere.
I know that F6 is a shortcut, but my keyboard is stupid (MX Master by Logitech) and has the F6 button mapped by default to keyboard backlighting, so I have to do FN-F6 to show or hide it which requires two hands and interrupts my flow.
A small feature, yes, but it would be great to see this revised.