I'll always take an excuse to link to one of my favorite StackOverflow answers, to the question "Why does modern Perl avoid UTF-8 by default?": <https://stackov

I'll always take an excuse to link to one of my favorite StackOverflow answers, to the question "Why does modern Perl avoid UTF-8 by default?": <https://stackoverflow.com/a/6163129/2521092 https://stackoverflow.com/a/6163129/2521092>. It's from 2011 and Perl-centric, of course, but skip down to "𝔸 𝕤 𝕤 𝕦 𝕞 𝕖 𝔹 𝕣 𝕠 𝕜 𝕖 𝕟 𝕟 𝕖 𝕤 𝕤" for a thorough, if opinionated, list. My favorite, similar to the issue of case-folding, is the idea of something being a "letter" and "lowercase" but NOT "lowercase letter."