Yeah I would have a different idea of what makes a TV show dated, from the examples mentioned.
For me it would be about the ideas/concept and execution. For example - and I’ve not watched a single episode but from what I gather - Mrs Browns Boys was dated from the outset. It was an old fashioned sitcom with a dated visual approach.
That’s different from a show that may have aged poorly. I would not personally say for one second that The Sopranos or The Wire have aged poorly. Naturally they have things like pagers that reflect a show of that particular time period. Not dated in the slightest though.
Whereas something like Friends, there are certain episodes where characters are pretty homophobic - that is dated stuff and hasn’t aged well. 24 maybe another one, where the characters are pretty jingoistic and it’s fairly prejudiced against people of certain backgrounds (oh look this brown guy must be a terrorist!) - that to me is dated.
I should add that The Wire and The Sopranos are my top 2 favourite shows of all time!