Well there are two qualifiers there: >unless they're evidence of some interesting new phenomenon. and >If they'd cover it on TV news, it's probably off-topic

Well there are two qualifiers there: >unless they're evidence of some interesting new phenomenon. and >If they'd cover it on TV news, it's probably off-topic Going off these, I would say "A deep dive into the IRS's legacy computer systems" is clearly fine, and the others could be considered questionable to varying degrees. I think it's fair to say that a news update should not automatically be considered an interesting new phenomenon because almost by definition all TV news will have some new element to it, and that is expressly labeled as "probably off-topic."