It's a very large country with truckers being at a premium and revered... they are out there as proud as ever. You probably have less owner operators as opposed to employees of a company as GlobalNorth referred to.
It's basically location, I live in an area that was once a heavy trucker CB area in Pennsylvania where the Pennsylvania Turnpike, the New Jersey Turnpike, Route 1, Route 95, Route 13, and route 195, connected, with multiple truck stops and restaurants. At one time this was the busiest area for CB on Channel 19, lot lizards with handhelds and all in the 70s 80s 90s and Beyond.
That started to slow down in the early 2000s and today Channel 19 resembles Channel 9 in the 80s. We did have one psychotic who would ramble on all day with profanity and playing music and whistling for a number of years ago but he's gone now.
It depends on your location. I still listen to Channel 19 on one of my multiple radios. Once in awhile you will hear a caravan momentarily moving through.
In other parts of the country it is as busy as ever. It really is location-based