In D10855#214380, @ngraham wrote:

Does this result in a behavior change such that a slow user with a mouse who clicks and then leaves the mouse in the same place for a moment will get a context menu? If so, I'm not sure that's a good idea. Lots of users aren't so great with non-touch input devices and this would result in a lot of frustrating interactions.

Ignore this comment. I had misunderstood the patch and the underlying feature itself. I rescind any and all concern regarding this patch.