You were right - it was threadshitting and absolutely unnecessary on my part. I'm glad you had to go back over a year to find an example of my doing so.
I'd like to think I don't threadshit often. I think I recall admitting and apologizing for threadshitting at least once around here - but I lack your recall of distant threads.
I would suggest, however, that there is a distinction between presenting an unpleasant and unnecessary personal opinion - as I think I did in MPSIMS, as opposed to Markxxx
averring faulty recollection as fact in GQ, and after being called on it coming back to slightly clarify the misstatement and accuse to other person on not knowing what they were talking about.