counterpoint, and I know it's not apples to apples, but have you ever used an old terminal app? Buffering the key strokes and then applying them _once_ the menu was ready was awesome. You could move so fast through an app
Could often do this in ye olde Macintosh System Software, too. Could fill the event queue with events, and rely on the program to intelligently clear the queue just before an incompatible UI change.