Ah, the voice of experience. Oh, wait...
Depends where you are. Around here, basically, no. At my current hub, there is only 1 CPU account that I know of with those. Anything else with fixed rollers on our property is basically a mistake, because that was the only equipment left somewhere else. Having worked at multiple hubs in my Local, I'd say it's less than 1 in 50 (closer to 100) customers that want that equipment to load (or it's the customer counter trailer).
You're right, they do cost more. Couldn't be anywhere near as much as it costs to clean out pallets and shrink wrap from all the other trailers, but what do I know? But seriously, most shippers around here are set up to palletize their freight (and have an automated machine to wrap them).