As there are more and more content produced everyday, old content which are non time sensitive which still provides a lot of relevance are “pushed back” and replaced by the newer ones. There should be a tool where you can rediscover these old gems.
If the relevance is still there, not only can you reshare them and get more page views, you can also reduce your dependency on the need to produce fresh content everyday.
In a way, you are helping your new audience rediscover these old but “still relevant” content, because overtime your audience should technically grow, but overtime, your old content only get buried away by all the digital noise.
Something worth looking into.