Apple & Google Maps now gives updates about traffic all across the USA. There is no need to use CB radio channels 17 (N & S) and Channel 19 (E & W) Technology keeps on progressing.
Both of those resources are good. But, not infallible. In rural areas, they are of little help. While CB use is down compared to several years ago, it is still a useful tool. I have been in Northern New Mexico late at night during the winter. And having a CB radio on has saved me and other truck drivers from dangerous encounters with wildlife late at night.
One night in particular, I was driving south on US285 in northern New Mexico and another driver heading north called to me on the radio saying that there were some Elk on the roadside about a mile south. I thanked him and sure enough, about a mile further on I saw the shadows of some Elk crossing the road. I stopped and sat for over 15 minutes while a huge herd of Elk crossed the road. Just as I had stopped I could see in the distance another truck heading north (saw his headlights and clearance lights). I called to him on the radio and he answered back. As I said, we sat there for over 15 minutes while that herd crossed the road. They were moving at a fairly fast pace. So, there had to be at least a hundred or more of them crossing the road.
Google Maps or the Apple traffic app would have been useless in that situation. There isn't even any cell service in that area.
I have encountered similar situations where a phone app would not have helped. And sometimes, even if the app does work, the information hasn't been updated and the warning is no longer valid. If you leave your route based on outdated information, you can end up having problems you could have otherwise avoided.
I agree with SlowMover and others that drivers need to up their game and make sure they have a good CB and have it installed properly. Truckers need as many tools to help them get to where they need to be safely. CB radios, scanners,and a GPS that has live traffic and weather updates, designed for truckers, are necessary tools to make the best choices on the road. Cellphones are good to have. But, depending solely on a cellphone and cellphone apps is not smart and could endanger a driver. Use all the tools available to you.
The idiots causing problems on channel 19 will slowly disappear as the current sunspot cycle starts trending downwards. When it is difficult to use the radio, use the other resources. But, don't abandon the CB thinking it is no longer useful. It is, and will continue to be, useful.
James