This is a use-case where Stackoverflow fails as well - oh so often I have a problem where Stackoverflow has a question with answers that were true some years ag

This is a use-case where Stackoverflow fails as well - oh so often I have a problem where Stackoverflow has a question with answers that were true some years ago for an earlier version, but is not true anymore, so the existing answers are worse than useless (as in, they're actively misleading and wasting time) but re-asking the question gets closed as duplicate. Being unable to clearly mark the bounds of relevancy for answers (in a structured way that affects search) is a major weakspot of SO.