Although I do agree I've noticed a change in community tone and tolerance that i don't like either; I think that's just the nature of it though, of any community. I don't know that it HAS to be that way, but that seems to be the default behavior.
SO is a great site for the first five years of a developer's career. After that, it's value wanes as the questions become less "how do I do this?" and more "how should I do this?"
The problem is, being a good site for both things would be difficult. There are plenty of places out there that cater to extended discussion within expert groups. Forums have been around in one form or other almost since the dawn of the web. The problem with these is that they're bad at one-shot Q&A (as the answer to a question might be pages after it was asked, or not there at all, or out of date, and it might take you a long time to work this out). This failing is exactly what Stack Overflow is about, and exactly why it's not good for deeper engineering questions.
I'm unfamiliar with the state of IE Web Dev support at the moment, is it currently a good forum for extended discussion?