In my truck is a similar black plastic box, containing a decent tool set, with pliers, screwdrivers, allen, torx, sockets and good wrenches. Tire plugs, an inflator, tow strap, lifting straps, rope, duct tape. I also have a good set (all copper) of jumper cables and a jump box. There is a duffel bag in the cab with a warm coat, gloves, a hat, scarf, and blanket. I keep a couple of water bottles, and I think there is an MRE in the box.
I am prepared to fix most things, as well as to spend the night, perhaps more, in inclement weather.
Many times, when I lived in Vermont, I was the only car on the road, late at night, in the snow. A wreck, or breakdown, brought the very real possibility of spending the night. In sub-zero weather. The kit back then included a sleeping bag, too.
Since buying the Tundra, and moving the kit over from the 4Runner, the only thing I’ve used the tool kit for was assembling IKEA furniture when helping my kids move into college dorms, or apartments.
But I cannot imagine being on the road with at least a bit of self-sufficiency.