For a fullscreen window it would be nice if moving the mouse all the way to the right edge was sufficient to target the scrollbar, but that doesn't work in Chrome on my mac

My browser is rarely against the RH side of my display, or even on the RH sie of my screen.

My preferred informational / programming layout is browser on left, terminal on right.

And in any multi-window layout, any window not aligned with the right-hand display border remains difficult to target.