> A key point is protection from attackers.

Who is going to be attacking you? Seriously. Even with all this crazy stuff going on we live in one of the most peaceful times is history. Especially in the West, which is where most of these are going to sell (few people that live in these violent places could afford this. Except maybe the authoritarian regimes themselves).

Personally I'd rather get the extra miles that a lighter vehicle offers than knowing that I can shoot my truck with a pistol. If you feel like you need this kind of protection then I feel sorry that you live in such unjustified fear.