My take on it: postings slowed down by 50% in the early 2010s when the novelty effect wore down. Then it slowed down 50% when peeps got pissed off at each other because of political differences in subsequent years. Then it slowed down by 99.999% when Slayer got tired of being a one man show this year.
It's so slow that I struggle to even make a post about nothing like this one.
Note: percentages are approximate and not cumulative. May not add up to 100%.