Keith Moore writes:
there will still be a need for canonicalization of certain fields
No. All text is already, at a minimum, C-normalized. Keyboard interfaces
get it right, and other programs don't randomly switch accent positions.
Anyway, your hypothetical Unicode normalization problems would also
arise in normalizing RFC 2047, so you can't use normalization as an
argument against moving to UTF-8. (The big problem with normalizing RFC
2047, of course, is the horrible mess of character encodings.)
Your ``sufficient testing through ordinary usage'' argument is equally
silly. Testing UTF-8 is much simpler than testing RFC 2047.
---D. J. Bernstein, Associate Professor, Department of Mathematics,
Statistics, and Computer Science, University of Illinois at Chicago