living with it
I think the point was not just that he loses the assignment when he unplugs a device, but also by default of such action he loses the parameters he set up for accessing it. Therein lies his real beef. To "just live with it" is no simple hassle for him. Plugging the same device back into the same port is okay (though perhaps multiple devices have to be in the same order if Windows assigns by "next available"), but he'll still have to re-instruct Windows about access specifics/preferences each time. I suggest he read the answer by "bus".