I didn't make reference to market share - I said it was the industry standard. There's a difference. Generally the two are aligned, as in this case, but not always.
However, as I mentioned earlier (and after further review, it turns out I was correct), the post asked about WYSIWYG editors, and in that realm, Dreamweaver is king. Sure, anyone who's "seasoned" knows that table-based layouts are going the way of the Dodo, and yes, most coding Apps have a "preview" function, or a "view in browser" button, but that's not exactly the same as WYSIWYG.
Now, to your point - I agree that Dreamweaver has lost ground in recent years, especially towards the end of Macromedia's solo tenure. I actually was beginning to grow very weary of the Studio MX suite myself, and I am a fan. But Dreamweaver 8 has implemented a lot of what made other editors popular, and actually the WYSIWYG portion has become less accurate, and less integral to the program (as it should be).
Which brings me back to my last post... I've played with TextMate a little, and for the purposes of HTML and CSS, found little in it that was much different than the hand-coding environment in Dreamweaver (or, for that matter NVU, Amaya, or any other I can think of). They've all got a tabbed interface, they've all got collapsable tags, shortcuts, auto-closing of tags, etc. So what makes it different or unique? I'm not being fecitious, I'm actually asking someone who uses it regularly for some input...