TBH, I would support expanding more deathfats (heh) into subforums of Deathfats proper, including turning this into one, rather than collapsing the thread.
Fuckoff-huge 5000 page threads suck. Following them is terrible when missing a day puts you 20 pages behind. I gave up on Chantal's thread because I didn't read it for a couple days and suddenly it was unfollowable, and most of those posts aren't even interesting. Huge threads are horrible to search and keep track of occurrences in -- any common term will get thousands of hits. If Amberlynn was collapsed into a single thread, it'd be what -- 3k, 5k, 7k pages? 10k? Just unreadable, even when she's slowing down. Not to mention you'd get about 50 pages of "amber is so boring now!!!!!" for each time anything actually worthwhile comes up, and those are just the fucking worst.
Simultaneously, it's fair to note Amber doesn't necessarily deserve front page real estate at this point. The board collapsed into a thread would be unnavigatable, but the board as a front page board just exposes a slower cow to a noobier audience. It also creates the perceived unfairness with currently more popular cows like Chantal being confined to a single thread. I think the more reasonable path would be to move the Amber board from the main page to Deathfats as a subforum, and to create additonal Deathfats subforums for Chantal et al to organize those topics better.