You know how Stack Overflow disallows asking for software recommendations because the answer will become outdated too soon? Guess what: other answers may not decay quite as fast but they also become outdated. And Stack Overflow isn’t really dealing with that.
I see it because I have a large number of outdated Firefox add-ons answers on my account which are completely useless today. Every now and then someone will come and attempt to make sense of these answers, sometimes even edit them. The MDN documentation related to pre-2018 Firefox add-ons has been removed, but Stack Overflow answers will still show up in search results frequently.
As Stack Overflow gets older, this problem will only grow. They better figure out a way to clean up their site. Assuming that they are interested in providing useful results rather than merely having high search rankings.