Will it be appropriate on this forum to discuss LaTeX editing issues that are editor specific? For example, the two responses to this question are Emacs specific. While AUCTeX and RefTeX make Emacs-based LaTeX editing a dream, I imagine that the majority of the community might not be interested in arcane discussions of font customization in AUCTeX to make things like nice, etc., etc.
For any given question, the majority of the community will not be interested in it. Everybody has their own particular interests that generally span only a small part of the topic area of the site. So I'm inclined to say that editor-specific questions are okay, as long as the question relates primarily to *TeX and is not just a general question about an editor that someone happens to be using for *TeX editing.
Editor-specific answers to an editor-independent question (as in the example you linked to) are kind of a separate issue, but I'd say they're also okay. Some people will be amenable to using any editor that gives them access to a particular feature.