My apologies to John for replying to him personally instead of the group as I intended. Here’s my response so other’s can comment.

It causes havoc with html validators, some websites and comment

systems don’t handle unicode, in some fonts there is no discernible

difference between a hyphen and an en or em dash, it makes, for me,

editing the html tougher at a later date, and it’s a personal

preference in html code I’d much rather see … then a character

that without mousing over I can’t tell is an actual ellipsis or

separate periods, and, too often for my liking, switching systems and

apps can cause the unicode to be displayed as some crazy east european

diacritics.