Question on collapsing threads

I don't know of any place in a FAQ where it mentions the "after 50 comments received, the comments thread will collapse itself automatically" scenario. Assuming that I'm not just missing it, I wanted to ask:

a) Is this worth mentioning in some FAQ-ly way, and b) if so, where?

I was at first thinking it could go in the catch-all FAQ 148 - What are LiveJournal's limitations on data?, since that's already a conglomeration of all sorts of 'number-related thingies.' Is there a place it would fit better?

It's not an uber-common question, but it does crop up a few times a month, I think. So I just wanted to see if it should go somewhere in a FAQ, or if everyone thinks we should just continue explaining it as we do now.