Also, if anyone (who doesn't already use Dvorak) has the misfortune of needing to use your computer with its Dvorak layout, that misfortune is amplified by many

Also, if anyone (who doesn't already use Dvorak) has the misfortune of needing to use your computer with its Dvorak layout, that misfortune is amplified by many orders of magnitude if there's no visual indication of which keys are which.