Is there any way to find out what threads have the most views and/or most replies?
This thread is fairly recent and has the information you’re looking for, as well as a lot of other estimated board records. Link.
If you don’t want to page through, the “a” thread was the longest. 5,000 some replies, spanning 107 pages. Next I think are Fingoflin’s Lord of the Rings Thread and Flamsterette_X’s Song Title Thread.