1. the issue is that it wouldn't do anything because no one uses them . . .
Careful...you are dehumanizing truck drivers!
My girlfriend doesn't need one to know road conditions. She tunes her car radio to a local AM station that provides traffic updates every 10 minutes.
She also uses her cell phone to check the fastest route to where she is going.
2. I just think they're cool!
Yes, when there were no car phones and ham gear was frightfully more expensive.
3. I live in an urban environment. People deliberately run stop signs and red lights. They deliberately drive the wrong way down one way aisles in supermarket parking lots. Accordingly, I don't play the radio, use a cell phone or use any communications gear in the car.
4. What communications gear is really functional? When the power goes off, the cell phone circuits are overloaded. When there is a real, wide spread emergency, you are low down on the totem pole and your ham gear is essentially useless. Regular civilian users of ham gear spotting emergencies on the county monitoring system are told to get off the repeater. Unless there is electricity to a private repeater and it is unlocked, you ham gear doesn't help you in my area.
One day I finally figured out that buying a pile of FRS gear that operated on common batteries, that were super cheap, and was a better way to go because you hand out units to your neighbors and organize faster than having expensive ham gear.