I still drive my car to gigs. When I start riding a bicycle to gigs I guess I'll look for a 3 lb head.
You're right, if you're still driving to the gigs, aren't 60 years old/arthritic, it shouldn't make a difference. But where these amps are going to shine are for those living in large cities where owning a car is ridiculous. For instance, I can keep my lmII (when i get it) in the closet in my dorm, throw it in the second spot of my double gig bag, and jump on the subway to get to a gig where I could use a backline. Before, I would have had to borrow and amp or take a cab to the gig. this is a lot easier.

Now have I offended enough of you yet?
).