export was never implemented properly in gcc or MSVC, (but apparently was so in EDG/Comeau, as comments say), but I'd guess it never got widespread acceptance. (But I mainly live in the gcc/msvc world, so my viewpoint doesn't encompass the entire C++ community.)
As for exception specs, I believe they were broken too.
Third, deprecation doesn't mean will-cause-compiler-errors. It's just strongly suggested that user shouldn't use it and, if applicable (not so much here, I think), move on to other mechanisms to achieve the same goal.
