I think the weight of tools people are bringing relates directly to their past experiences and the condition of their trucks. I bought mine about three months ago and almost everything I looked at has been Mickey Moused. I have been spending most of my time on bodywork, and frankly, I have not even had all four wheels off. It would not make sense for me to drive with no tools. Give me few months or so to have things sorted out and I will be carrying a lot less. Bill, You are a brave man to not carry a jack! I didn't last weekend, but that was more lack of planning!
And of course it depends on how far and where you are going.
I think my long term goal will be confidence to not bring more than a cell phone. But that means I better get off this iPad and out to work again.