Interesting. I am sure some of it comes from Biden being more of a known quantity for a longer period of time. But a lot of the revisions I see are fairly minor and often repeated, such as one that changes the heading "Public Safety Commissioner dismissal" to "Abuse of power" and back again, and "Pro-Life" to "Anti-Abortion" and back again.
I did find one revision which was pretty chuckle worthy. Look at the previous revision for the picture of the moose.
It seems I am not the only one who found this interesting. I haven't read the story, but it looks related to what I was observing.