Mostly, but also take it when I fly, along with a mouse + mouse pad. The weight has never bothered me, usually the backpack with the laptop in it is the lightest bag and then I have a much heavier carry on as well.
So that makes sense it is not issue for you if you mostly travel by car. But it can be for those that use bike or public transport or just walk. (As example last time I used car about two months ago).
