It's entirely possible my memory is faulty, but I remember in the days when threadless headsets were new and trying to compete with end-user-adjustable quill stems that steerers were left un-cut by the manufacturer. You'd be measured for a bike so they could adjust the saddle height and cut the steerer & install appropriate spacers. Maybe if the frame size had to be ordered, a steerer length spec would be sent along & the manufacturer would make the cut.
When ordering a Specialized AWOL, I was told all the steerers are cut to a single specification and that only custom builders like Calfee would allow this level of customization. That attitude seems insane to me. I know I can get a Soma bike built at American Cyclery in San Francisco with a lot of spacers. There are fixed frame sizes and they still charge for a "complete", not for frame/fork & individual components.
So, is it true that Jamis, Cannonade, Specialized, Trek, Raleigh and the rest offer no adjustability other than down any more?