So, Who Does Use This Stuff?
Well, all of us. As I said earlier, both the Mac and Windows operating systems apply CIE-based color management to everything they paint on the screen. We’re never aware of it, but we would be aware if it were missing; though it’s not as precise as professionals need, color management very much improves color matching among devices for us casual users.
In the professional design and print world, people mostly use CIE-based managed color only if they work in very well-calibrated environments. There are workplaces where the first thing a graphic artist does at the beginning of his or her shift is put a little suction-cupped dingus on the computer display and run software that makes that display go slightly crazy, filling with constantly-shifting color. The software is reading how the screen is reproducing color today and creating a color profile that corresponds to today’s monitor. Similarly, at print time the press operator runs an initial short run of color samples on the same paper as will be used for the final production; software then creates a color profile for the printer as it is right now. The printing system then uses this one-off printer profile to convert colors in the PDF file to their closest CMYK equivalent.
For people who work in such environments, CIE-based color management works very well; I’ve had many such people in my classes over the years, and they are all very enthusiastic.