We're happy to release the new version of the Meta Box Group that supports collapsing/expanding groups with a new UI. This version truly bring the power and usefulness of the groups to our users. With it, you can collapse a very long group, drag and drop it to reorder and save that collapsible state. So next time you edit that post, that group is collapsed automatically.
Here is the video demo of this feature:
If you haven't updated the extension, please update it now. If you haven't got the extension, it's time to have it!