The reasoning is that mouse stops the border of the screen no matter how far the mouse is moved, making an effective target that is huge off the screen, so easy and quick to hit. This would hold true even with large screens, unless you dial down the acceleration of the mouse for fine control--as others have pointed out.
But the issue is Apple broke the whole mechanism with hot corners. Now if I move fast anywhere near a hot corner, it gets activated. And now the menu bar near the corners is tiny and hard to hit with a "huge" hot corner right nearby (the hot corner gets the benefit of the inifinte off-screen target). I find the same problems will full-size browsers (with tabs along the top), I'm always hitting the hot corners instead of the top lerpft and right tabs. I guess I can always change my corner settings.
Additional gripe about the top menu in MacOS: the biggest fault I've found is that it can be active for an app whose windows are hidden or that currently have any windows, thus creating a mismatch between what you see (other windows) and what is active (responding to keyboard shortcuts for example).
I'm super happy you brought up the infinite border aspect of the top menu, because that is the best aspect of it, and whenever I go back to Windows, that required fine touch control drives me nuts.
But WRT hot corners, the best part of hot corners is being able to assign a modifier key to them.
Without using the modifier, it's crazy annoying, but having a modal aspect that requires active engagement seems to me the best of both.
Then again, I haven't actually engaged a hot corner in years. I find Keyboard Maestro the best option of all.
(P.S. just for anyone who doesn't know how to add a modifier to the hot corners, just hold down Ctrl, shift, option or CMD when selecting the setting).
OTOH, that behavior is absolutely necessary for me!
You can use Cmd-Tab to activate an app that has no windows, in order to activate hotkeys that let you create new windows! Especially when you’re using multiple desktops, this ability is invaluable.
But the issue is Apple broke the whole mechanism with hot corners. Now if I move fast anywhere near a hot corner, it gets activated. And now the menu bar near the corners is tiny and hard to hit with a "huge" hot corner right nearby (the hot corner gets the benefit of the inifinte off-screen target). I find the same problems will full-size browsers (with tabs along the top), I'm always hitting the hot corners instead of the top lerpft and right tabs. I guess I can always change my corner settings.
Additional gripe about the top menu in MacOS: the biggest fault I've found is that it can be active for an app whose windows are hidden or that currently have any windows, thus creating a mismatch between what you see (other windows) and what is active (responding to keyboard shortcuts for example).