I have mine set now at 100 posts per thread. On the old BYC the max was 75 I think.
I wonder if that's only a feature for Platinums, since a GFM posted here that they couldn't see the setting.
It's important that different people can set it to different numbers of posts per page, because different computers/browers/phones/internet connections behave differently. For example, on a phone, it can be really hard and slow to scroll down 100 posts, that could take a couple minutes. On a dialup connection desktop computer you want lots of posts per page, because each time you change pages it could take a minute or more.I wish we could all have it set for the same number so we would all be on the same page so to speak.