Comment 9 for bug 946104

I would vote for making it optional, of course.

The difference I see with the left-hand launcher is that it rests on what feels like the physical edge of your virtual workspace. "Pushing" against the edge of your workspace to make the launcher appear makes *sense*, almost on a tactile level. Like pushing in an SD card to make it pop out.

Maybe I have a different mental model of my multi-monitor workspace, but there is no physical boundary between monitors in my head. It's all one contiguous area that I'm looking at through two or three monitors. Putting any sort of artificial "physical" barrier between those feels very jarring to me.