U could see that there are so many topics here. I can't be sure which one is what I want to know. So could the topics be folded at first and after I scan and find the one that I am interested in I could open it up?
Topic on Extension talk:StructuredDiscussions
That's not possible at the moment. Wen plan to enable a search system to allow you to find what you are looking for.
You can use the "explore topics" button to see a list of topics and navigate directly to them. I use it also to skip to the next topic when scrolling for large topics. A way of collapsing topics would be helpful IMHO, the same system resolved topics use.