To be quite honest I'm surprised more people aren't switching to VHF/UHF over CB. It's such a better form of communication with more range and acces to emergency services. I guess the only downside is the cost as they are typically double or more the price of a decent CB.
I have both and while the race radios do come in clear and have a greater range, I still prefer a CB. As mentioned, they are more affordable, most people have them, so long as they're dialed in, they work great for most runs and they don't have the annoying static blasts that a lot of race radios tend have. Also, it could just be me but I find it hard to find an open channel that everyone can use on a race radio and that isn't being used by law enforcement or every other Jeeper or side-by-side group.