Ok. New attempt posted. It looks like it is not going well, but let's wait. Sometimes it takes a whole day for things to crash and burn spectacularly.

Given the number of downvotes, readers will have to work to find this meta post. Much as I prefer the edited form (I really am bothered by rants), I agree with Bill Johnson and think a new question with the same topic be started. If encouraged, I will make the new post, and someone can copy the answer so it is more visible.

Absolutely right @quid. I should have said StackExchange, not StackOverflow. Thanks for the correction.

There is more than one level of redress, and more than one avenue for support. You can email both StackOverflow and MathOverflow moderators for assistance. Although you may have a complaint that is valid, and may be upset about, editorializing afterwards is more likely to get in the way of a good resolution than to help.

There are many who participate in both forums. I think the usual guidance given to questions that are better suited elsewhere is applicable to questions suited for ME.SE. Tweaking the help pages to include it is good. Migrating historical ME questions from MO is not good. Spreading awareness of ME.SE in a low-key fashion is good. Reacting as if to anticipate a serious problem is not good: I don't think conditions are such that any strong or even mild reaction to ME.SE's presence is required. Just go about as usual, and refer to the other forums as needed.

Actually, it just assumes that either the answer is currently known or the answer is not currently known. The law of excluded middle is more general. Also, he hasn't said QED; he may present Case III later.

"research level" is a code phrase for "acceptable to most of the MO community", and is a characteristic that changes over time. Learn by doing, and take closures and criticisms as feedback, and not as social censure.

"famous" could also mean "viral", as in the perfect billiards break posted some months ago. I imagine the present question ranks high on certain web searches.

@quid, let me guess: Discourse has not just a discussion thread feature and a search feature and a login feature like Vanilla, but also has one or two features in common with this meta that support such discussions. Hopefully Scott will make those features clear.

Something ventured, something gained. At last count, no serious casualties from this venture. I am looking forward to your next question.