Started 2.5 years ago. Essentially died off with almost1 no consequences.
1Accepted answers were unpinned from the top which I admit is something. However, it did not really address outdatedness all that much.
There was also trending sort which probably helped a bit with the outdatedness. But I am not sure how much. Or how much is it even used.
A comment from V2Blast:
I think it would be helpful to identify what exactly you'd want to see worked on in this regard. (I'd also note that the Content Discovery initiative is sort of the successor to that project, in that it builds on learnings from that project.)
I never saw the Content Discovery as anything even remotely like Outdated Answers. These are two entirely orthogonal concerns to me:
Content Discovery tackles "How can I find information which is probably buried".
Example: some user trying to find a solution and the solution existing but not being able to be found.
Outdated Answers "How do we identify and deal with (either highlight or maybe remove) information which is visible but potentially wrong nowadays."
Example: a user easily finds a solution from 2010 and that is no longer a recommended path to take. It might have been wrong a decade ago as well but just the least worst. Or perhaps in the intervening years, new approaches that solve many more potential issues showed up. Might even be that problems with the old approach were found and it is dangerous to use it.
Part of the Oudated Answers is to also promote the recommended approaches one should take instead. However, toppling the historical inertial of old dangerous answers is a concern.
We solved this:
Only for accepted answers with low score. The same issue of reducing code quality around the world is still not solved where instead of a checkmark, the answers have accrued a score higher than all good or at least more correct answers combined. By virtue that the old answer was...older. Rather than better.