Yes I have and use several Mags. They are in various states. Some stock for nostalgic reasons, some lightly tweaked, some highly modified, some shortened, some lengthened, some running on AA's, some running on, 26650's, some on D's, some on 14500's, some on C's, some are converted to lasers, some XML's, some triple Nichia 219B's, the list goes on.
I love maglites.
I guess it sorta depends on what his "Emergency" purposes are. lol
I keep a mag in each of my vehicles. But, they are tweaked with Malkoff drop ins. Solid & bullet proof, look like normal everyday lights. Less likely to draw attention and be stolen. Then I also keep some SolarForce L2 style lights with various drop ins. I usually have a 5 mode drop in in my car lights. That way I have a mode for any situation. Then I have about 6 laptop pulls 18650's. So far in several years, I have never run out of light.