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by not2b 2202 days ago
But movement of a post to the bottom doesn't help users who find it directly via a Google search. If it was a high-quality answer in 2017 and is badly wrong now, it may still be a highly ranked URL in Google's database. So the obsolete flag would need to prominent for people who follow a direct link the answer.
1 comments

Did you also see this part?

> and gets a red background color or is faded out

And most of the time, a newer answer is available (at least in my experience) so for those the downranking would also help.