Post History

That's perfectly fine, at least as I understand it. However, one thing we have been working on here is a "post-only" item with no actual answers, which can include "Canonical questions" or "FAQs" or other types of posts where instead trying to fit an item into "Q + A", instead it is structured as a single post, edited by multiple people as needed, to provide commonly used information. This could work well, IMHO, for things like the "How to buy electronic components" question in Electrical Engineering - i.e., a question that has broad interest, not specific to one particular project or component. That will have a big advantage that the post will be in a different category so that "old" posts won't get lost the way they do in certain other systems.

On the other hand, if a particular post is very specific - e.g., you are self-answering because you had an actual problem and came up with a solution, then self-answered Q & A makes sense.