I have some old articles on my blog that always decrease in readership. I do a pass every year, change a paragraph here and there, change the alias/url, and then get 5x the readership for a few months. Rinse and repeat. Most of my traffic comes from Google. Also, most of my content is in such a specific niche that it doesn’t really age much in 5 years.
So recency bias kinda works against people discovering useful content. But whatever. Google is in decline anyways.
I just ran a Google search on some code I was working on 15 years ago, posted to blogspot.com. It was about card game X, using programming language Y. The relevant keywords appear in the blog post. However, it completely failed to show up in a Google search. Just... nothing, even when I scrolled through the "more results" stuff. There were relevant and more recent links to the same topic (and likely better implemented, but let's leave that aside).
I did find my page on a Bing search after getting it to not ignore an important keyword, so that's something.
So recency bias kinda works against people discovering useful content. But whatever. Google is in decline anyways.