Let's rewind to 1996. I encode a document, and I want a math "less-than or equal" character. The picture I want for it has the equal bar slanted. Looking throughout my Unicode 2.0 standard, I conclude that U+2264, LESS-THAN OR EQUAL is what I want (with a font that happens to have a variant glyph compared to the code chart glyph).
Let's fast-forward to the day were Unicode 3.2 is published, and I encode a follow-up document. Should I continue to use U+2264, so that my users get a consistent search-and-replace behavior, or do I try to be modern and switch to U+2a7d, LESS-THAN OR SLANTED EQUAL, which seems more appropriate? Thanks, Eric.