What's the most comments on a forum post? Lets find out, I was looking through the forums and I found 108. Ill keep looking but I think this is it. Updates down below.
9/16/22 So far the longest post I found is "Ask the Transition Team about Scratch 2.0 by @MelonInc (New Posts)" Now inactive with 108 comments. 9/19/22 Today I found "Vietnamese by MLOZL (New Posts)" with 4581 Posts, holy crap. This was posted on today, its in other languages. Ill keep looking.
