Is such a long answer suitable in OT? If not, where should I move it?

Anywhere is better than nowhere.

I think this is sufficiently good to go directly to Main article, but generally the safe option is to publish a Discussion article (which in case of success can be later moved to Main).

I would really like seeing more articles like this on LW -- articles written by people who deeply understand what they write about. (Preferably with more examples, because this was difficult to follow without clicking the hyperlinks. But that may be just my personal preference.)

So, here are the options:

• leave it here; (the easiest)
• repost as an article; (still very easy)
• rewrite as a more detailed article or series of articles (difficult)