That graph might not be that wrong. I remember a time at the void that when I woke up the list with new content was 100+ and you could log in every few hours and always have 20 new posts to read.
Nowadays you have to be happy if there's a new post at all and when I woke up today not even 10 new posts had been made.
I don't know exactly where it went wrong but it's safe to say the upgrade hasn't helped one bit.