First, learn how to count. You say "an article that’s 2 1/2 years old (September 10, 2019)" - Is it? Count again!!! And, you call other people stupid? Just FYI today's date is 4/1/2021.
Second, these are macro studies that analyze decade(s) of data/ trends etc. In this particular paper they have reported numbers from about 2008 to 2018 - as they are available. That article is by no means 'old' or irrelevant. This is possibly the latest analysis available on its topic.
Third, you say "which has questionable conclusions. And yes, I did bother to read the article with all its graphs, etc., and my conclusion is that the authors overlooked a number of other factors that entered into the results. " Great that you read and let's discuss where you do not agree. BTW there has never been any serious paper written that has no limitations. One can always argue like you did "authors overlooked a number of other factors that entered into the results" - about 90% papers published in top journals and outlets. So that criticism is opportunistic but not surprising or nothing new.
Fourth, fact that you read it here first from my OP proves it is NOT old to YOU.
Fifth, You say "I guess his point, if there is one, is that it’s OK to present old news but not OK to criticize that same old news because of the fact it’s old." You are comparing apples and oranges! You are comparing a study that is reporting decade's of macro-economic trend versus a post by me about a ultra-short term (weeks) phenomenon of virus spread - which changed every few months so much so it made your party and your savvier look like buffoons.
Finally, you can call me whatever you want because you are pissed at me because I called you out correctly - as a righty masquerading as a 'balanced' poster! But I am not the one who is stupid. Look again. At least I know how to count.
In the final analysis, I am happy for you coming out of the closet and showing your real color - of being a righty hack! I am glad I was able to help you.
Just a friendly advice: when a somewhat intelligent person like you joins a group of dumbs (Cuck etc) - he or she becomes dumb too over time because of the company he keeps. Be careful.