Another data point, the top AskReddit posts of the past year [0]. Zero of the top 25 posts of the last twelve months are younger than five months. Two of the top 50 posts are younger than five months. Comments (using subredditstats from a sister comment) have gone from around 70k per day to around 12k per day. [0] https://old.reddit.com/r/AskReddit/top/?sort=top&t=year
I remember during the blackout that there was an extra push (by reddit paid mods) of pushing content to AskReddit (or maybe they made up a similar sub) and were noticeably creating topics there