People who don't know anything about classic commuter bicycles assume they were terrible. That is far from the truth. My old all-steel Raleigh Superbe got lighter 700c aluminum wheels with better tires and was a breeze to ride. They're comfortable indestructible practical every day transportation. Not built for speed like a road bike but to get you in comfort and style from point A to point B.
That's really the only kind of all-rounder bike most people need.