Sub-Forums?

In addition to Nancy's suggestion, you can also use the topic tags at the top right to narrow posts to ones that have been tagged with Scripting or SDK. All the threads that were ported from Jive have had those tags applied. It will probably take some time for users to remember that these tags are useful to them and to add them to their posts. Meantime, moderators (I think) can add tags, or you can go back to posts you made and edit them to add the tags. The screenshot shows the tags that are available for the Illustrator forum.

Adobe recently switched from JIVE to a new forum software system called Khoros (formerly called L ithium).  You are correct that this system uses a flat forum format.  So the various sub-forums we all relied on for questions about scripting, SDK, etc... are gone.     But if you use the Search box at the top of your community board, you can usually find related posts on that subject.  See screenshot.