Sad news for sure. I recall the first time I watched this movie and thought it was a bit hokey. Then fast forward a few years and heard it at a truck stop in Sydney, Nebraska where I stopped while driving a missile transporter (Kenworth cabover/specialized Minuteman III trailer, I was Air Force at the time). With the trailer being empty that day (we just needed the inside hoist/winch), sometimes we would do the supply run of cold weather gear from Cabela's. Inside the truck stop, I am about to laugh at the "Convoy" song being played, when a 'cowboy' truck driver looks at me and the truck I just got out of, and replies' "now, that's a man's truck" as I sit down for some food.
More recently, I watch the movie 'Convoy' and enjoy it, then see a scene in the cartoon Futurama that played a few seconds of the song, with many space trucks stopping to re-fuel. My current employer also has a fleet of tractor trailer combinations, where CB is still used, along with commercial Motorola FM radios, for long haul rigs to communicate. FYI, current Cobra radios are not what they used to be. I have tried to get corporate to buy President brand CB's or at least replace current Cobra mic's with Astatic ones.
RIP CW, and may CB continue to be used for a long time. Just do not use the term 'good buddy' in 2022.....it does not mean the same thing that it did in 1975.