TL;DR Use good journalism style. If I understand correctly, you're saying that if there is one, then there shouldn't be one? I agree that the article should be

TL;DR Use good journalism style. If I understand correctly, you're saying that if there is one, then there shouldn't be one? I agree that the article should be iteratively deepening, but that doesn't change where a TL;DR section should go if there is one. If there is one, put it at the top; if not, give me all the information I need at the top and explain later. A TL;DR is an alternative to reading the article. If I have time, I'll read the article (if the title sounds interesting). If I don't, I'll read the TL;DR, bookmark it and refer later if I think I might need more info later. It's like the title 2.0, not a different name for an abstract.