I agree to a certain degree, focusing exclusively on mobile comms, if we take repeaters out of the mix.
My own opinion... CB is a much better stand-alone (peer-to-peer) radio service. In a mobile application, with 12.5 watts on SSB, I can talk 8x further than simplex UHF using 50 watts. Also, a few times a month, skip lets me talk around the country with 4 watts on AM.
I can talk to central Texas on UHF, too, but I need to be on a mountain top, using a 5 element beam and 1,500 watts.
That said, if you include repeaters, UHF FM radios provide great audio quality and coverage area. Though its still only local comms.
I'm not talking about repeaters. And for utility, mobile to mobile communications, skip is irrelevant at best and actually detrimental at worst. When I'm trying to talk to my buddy in the next Jeep, I'm not interested in having to compete with signals booming in from Florida or Texas.
Even SSB is pretty irrelevant for that use. Just about all the Jeepers I know use AM if they use CB. In fact that's the only real advantage I see to using 27 MHz for trail communications: they're ubiquitous and dirt cheap. It's possible to have a complete mobile setup including antenna and mount, for right around $50 if buying brand new.
In fact, going down that path a bit further, buying a brand new popular GMRS mobile setup including antenna costs $250. That's from a company that even CBers consider to be scraping the bottom of the barrel. I'll concede one thing: I would rather have a Cobra Model 19 (which can be found for as little as $20 new) and a 4 foot Firestik antenna than the aforementioned barrel-bottom-scraping GMRS mobile radio and antenna. And I don't know about 8x, but I don't doubt that that CB setup will beat that GMRS setup.
But, again for trail communications, I would rather have a $100 pre-programmed for GMRS, 25 watt commercial mobile radio working into a $25 hard-mounted 1/4 wave antenna than any CB setup. That's assuming my buddies have similar setups. If all they have are blister-pack radios and are unwilling to let me help them get setup with a decent radio and antenna, well I might just have to revert to CB again. I have both, so it's no big deal.
Now, if we're gonna talk about skip and working other states while mobile, I'm gonna bring up the subject of 40 Meters. I've worked quite a bit of 40 Meters mobile, mostly with the same or less power than the typical SSB CB radio. And with those setups I can work entire sections of the country, covering several states, all the time, every day. I don't have to wait for the skip to come in because the skip is always in on 40M.
First time I ever drove across the country with a setup like that, I was driving from Alabama to Lake Superior with a 20 watt MFJ SSB Adventure Radio to a Hamstick mounted on a Hustler 5" mag mount. The entire setup was less than $300 brand new, and I was into a couple of different 40M mobile nets the entire way.