I saw a question where a person describes their context, to which I have a considerable amount of information that I am certain the user (and similar users like him) will find useful, but none that actually answer their specific question. Should I respond with an answer, maybe prefacing it with a disclaimer that it doesn't answer his specific question? The user did title and preface their concrete question with 'best practices', indicating that they would be interested in additional context beyond their question.
Normally I would put such information in a comment, but in this case the amount of information would far exceed both the appropriate length as well as styling options for a comment.
I have wondered about this before, so the actual question link doesn't seem terribly relevant; if requested I will add a link, though I would prefer a more generic discussion/response on how I should act in such situations.