I work on a loading dock. Older, American drivers still use the CB. We have them on the lift trucks so we can give them directions. A lot of drivers, mostly immigrants, don't have them and rely on cell phones. I've even had a couple who said cell phones were too expensive, so we couldn't call them at all when it was their turn to get loaded.
I still run a CB in my own vehicles. My class B had one from the factory and still has the mount for a 1/4 wave antenna. I'm thinking of using my main radio in it the next time I hit the road.
On a side note, a LOT of people don't mount their radios properly so they don't get good range. Excess cable needs to be looped back and forth, not coiled. I got a Mustang in the shop once that would shut down when the driver keyed the mike. The extra antenna cable was coiled on top of the computer under the front passenger seat. Electromagnets and computers don't play well together.