Who's on CB anymore?
The CB band is full of activity. I hear a lot of local traffic, including quite a bit of business use (primarily trucking companies), and note that I live in a fairly rural area. Those in urban areas report considerable business use. Plus the general chat by hobbyists.
Then when the band is open, it's wall to wall signals.
I am hearing a fair amount of FM, mostly from Latin America, but also domestic. And of course the UK CB band when DX is rolling in, which has always been FM.