What happened to "Suggested" section under threads?

DPO used to have a suggested threads section under every thread, and I found it really useful for catching up on discussions. I don’t particularly care about the recommendations themselves, but that section would also show threads I’m tracking, with an unread marker. This made it easy to go from one thread to another seamlessly. Now I have to finish reading a thread, go back to the New tab, open the next one, and repeat until I’ve caught up with everything I’m tracking.