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I was referencing this:
linky
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So what's the difference if the referenced post said, "always push with <= xBB", other than that xBB is a less accurate metric? Or maybe there is no difference, and your point is simply that you don't like the "always do this" formula? In which case, people have been coming up with charts and systems attached to BB for ages, and the fact that there's some similar strategy associated with M as well has nothing do to with the metric of BB and M per se.
While I agree with what I think is the tone of your post ("if x = y do z" is not critical thinking), I will have to defend the referenced post: Unless there's some significant information convincing me to do otherwise, I can't see how call/folding or raise/folding can ever be correct with an M <=5. That's all the post was saying, not that you should follow some "green, yellow, orange, red" system to the T.