Re: case-table functions clobbering extra slots

[Richard Stallman]

    It isn't worthwhile trying to do special casing in Emacs 21, and there
    are more important things to sort out in Emacs 22 in case it's ever
    released.

To suggest it will not be released sounds rather harsh.
I hope you didn't intend it in that spirit.

               Normalization and proper locale handling are a couple, and
    case folding depends on them anyway.

Not being a Unicode expert, I am not sure what normalization refers to
in this context.  It's not obvious what would make locale handling
proper or improper, and that might perhaps be a matter on which
opinions may differ.  What we can be sure of is that these issues
won't make any of the known difficult cases of case folding go away.

So I see no reason why we should not proceed with collecting those
cases, looking at them, and choosing a mechanism that can handle them.