Regarding non-BMP codepoints:
On Tue, May 6, 2014 at 8:45 AM, John Cowan <[email protected]> wrote: > > > > and I have not yet encountered any need for the few remaining. > > It's by no means a few: as of Unicode 7.0, there are 10883 non-Han > characters outside the BMP and 47082 Han characters, for 57965 altogether. > Nor are they unused in practice. The most common non-BMP *script* is > Gothic. The most common use of non-BMP characters is the mathematical > alphanumeric symbols, which are required in order to do math in plain > text (see <http://www.unicode.org/reports/tr27/tr27-4.html> and search > on the page for "Hamiltonian"). > > If you scrape general webpages, write a general email-processor, or call web apis, you do encounter those characters time to time. Nowadays these kind of tasks are common enough and it would be cumbersome that every portable libraries in this genre need to handle in cases implementations doesn't support non-BMP chars.
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