Q is decently supported if you count browsers; not if you count market share. Which, you guessed it, means Internet Explorer doesn't really support Q at all, though any modern browser does.

Sorry for the late reply, and for being a bit crochety, but this has to be said.

I think you hit the nail on the head when you said <q>every modern browser does</q>. As far as IE, there are a lot of things it doesn't support, some of which are in fairly widespread use (alphachannel transparency comes to mind, and an assortment of useful CSS stuff), and yet, somehow, life goes on. Part of the design of HTML from the beginning was graceful degradation, and new versions of HTML — and websites — have taken advantage of this since circa 1995, going on ten years ago; it is normal for users of antequated browsers to not see all of your markup, but they can still read the content. As far as IE, it can no longer be reasonably considered a modern browser. It hasn't been meaningfully updated since time out of mind (6.0 came out when? And that was a pretty minor update; the last real feature added was Print Preview in IE 5.5, circa 2000) and is officially not scheduled for any further updates except for security (unless you count updates that pertain to OS/browser/filemanager integration, which will only be available as part of the OS upgrade process; whether those really would count as browser upgrades is debatable at best). Of the three major OS platforms most Perl users use, IE is an end-of-line hasbeen on one platform, a never-was lack-of-product on another, and horifically out of date with little hope of improvement ever even on its best, native platform. If people want to continue to use IE for whatever reason, that's fine; if they want, they can continue to use NCSA Mosaic; it's obsolete, but it mostly still works. They aren't going to see all the features of the web that way, though, and removing <q>unsupported</q> tags from Perlmonks isn't going to change that very much.

Yeah, I know, it's not a really big deal. We can always just use &quot;. It's not as if l10n is really an issue for Perlmonks, and it's not as if preview won't remind us to change out our quote tags, and it's not as if we can't edit our nodes and replace the quote tags ex post facto if we forget to do so beforehand. But I think filtering out a tag just because one legacy browser doesn't support it is misguided; legacy browsers are why HTML was defined in a way that allows it to degrade gracefully; the whole point of defining it that way was so that new features (though calling q tags a new feature at this point feels rather odd) can be used even if there are browsers — even very popular browsers — that don't support them.