The reasoning you see here is pretty much word for word why they are suggesting alt attributes be removed (authors abuse it, authors ignore it, why does anyone want it anyway). When actual users say "this feature would help me use the web" I don't get how someone else can say "well this issue it closed because I can't imagine why anyone would find this useful, end discussion." Whoa.
Recently (uh, months and months ago) on a mailing list I'm on, someone mentioned longdesc. I replied I was taught as a web dev never to use it: that many user agents ignored it, than it prevented you from linking images (which often is part of the architectural design) and that users didn't encounter it much. But the response was fairly positive for longdesc. People wanted it. You just don't hear them in the bug reports when people are writing specs.
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