Audio meters while recording
Magic Zooom (via half-shutter, or focus ring)
Cropmarks, Ghost image
Movie auto stop
LiveView settings (brightness, contrast...)
Image review tweaks (quick zoom)
and a lot more
When using trap focus, opening card door won't shut down the camera. Simply power off using power switch.
Formatting the card will also remove Magic Lantern files.
You have to reload Magic Lantern every time you use it.