And the Kindle thread:
https://www.mobileread.com/forums/sho...d.php?t=209276
850 posts
And the Legacy KindlePDFViewer thread (for non-touch devices):
https://www.mobileread.com/forums/sho...d.php?t=157047
1033 posts
And those are just the three megathreads -- some people start new threads.
I can easily see the attraction of a KOReader forum.