True we don't use it to suck up stray asteroids as much as they used to in the olden days, but it's still very pretty and a nice thing to be able to catch a glimpse of in the night sky.
With a Dyson Sphere, there would be no night sky. I'm kidding, of course. I wouldn't want to dismantle the Solar System. There are plenty of other ways to harvest solar energy. We could just dismantle Texas.