To me, safety concerns build on you. At first, you didn't like wearing a seatbelt, but once you got used to it, you hardly want to drive without it. At first you are just happy to carry the gun itself. Then you think about more ammo and pick up a spare mag or look at a gun with higher capacity. Then you think about multiple spare mags. For me, one spare mag with more in the truck is enough.
I guess the next thread can go further into truck guns as a backup to the pistol.
