Yes it will. Do you think threads automatically start with the post limit reached? No, they start at 0, thus for a good amount of time it will be very easily manageable. You certainly can't deny that it's far better than just letting the thread go on forever.
If you do that, you might as well start making thread for each news, then the title and content are on topic, it is easy to find and remember. This thread is just for offtopic related stuff, maybe small news someone doesn't believe it is threadworthy.