Let's take a moment to remember the time period when everyone had to adjust to using dual-joysticks on controllers.
(media.piefed.world)
Look, I NEVER played that way with the mouse move. Ya, its fukin bizarre.
But it allowed you to sweep forward and back in sudden waves, super agile. If you were good at it, it gave you a significant edge.
And the games that had that sort of locomotion were originally written to run on x386 processors, so you were fast in a slow world.