Some people naïvely think that ISO/IEC 10646 and Unicode, which are joined at the hip, make the development of national standards an obsolete practice. As my IRG41 contribution, IRG N1964 (Continued National Standards Development & Horizontal Extensions), makes clear, nothing is further from the truth, especially when it involves CJK Unified Ideographs.
The content of this paper had been brewing in my head since IRG38, and only recently has congealed into a concise one-page paper that should be daunting to no one. If you are interested in such issues, please read the paper and provide feedback.