The old 'maximum thread size' used to be 100 pages under the default 25 posts-per-page. If you were using 50 posts per page it'd be 50 pages, or 10ppp it'd be 250 pages.
That meant that the old limit was 2500 posts per thread. The new system uses 40 posts per page as default (is that changeable?). My question is, what are the new guidelines for making closing a thread that is too long?
The old limit of 2500 posts (62 pages)? 2000 posts (50 pages, 20% shorter)? 4000 posts (100 pages, 60% longer)? Or now that we're on new architecture, can we make 1000+ page long threads?