Cracker, Smily is right, but of course what you are talking about is two different things.
The most recent threads list is now back to thirty I think. If you use that as your interface (entry portal) as I think most members do, then you can easily miss many many posts and threads if traffic in new threads is high. You will just have to work around it I guess, like the rest of us do.
The previous 24 hour interface is flexable and can contain hundreds of threads. It is a more difficult scan, but not that hard to get used to.
I know that your concern, which I share, is not your knowing how to find threads, but the fact that many won't take the time to do so and therefore much of what is posted is never seen by many, resulting in the possibility of missed interaction which might just mean missed Answers, limited Answers, No Answers, missed opportunity to sell, etc.
I don't have an answer! It is my opinion that quantity (of threads, members, images) is the priority here. Not sure that quality always goes down as quantity goes up, but that could be argued here.(Quality is subjective to define but like porno we know it when we see it
I am sure though, that as more hay is forked onto the haystack, the golden needle is alot harder to keep up with, or even find.
I have noticed this subject brought up on occasion and in fact there was a poll that I saw while surfing the "archives" asking about the "recent thread list" size. I don't recall the results but the only change I remember was that management shortened the list from either 50 or 40 down to 30.
I think they did that to make room for more stuff such as "Vote For This Site", Visit Chat", EBAY Reports, "In the News","We've got X__X Members" etc. on the Home Page.