This idea has been merged into another idea. To comment or vote on this idea, please visit WEBFLOW-I-161 Custom order for Collection Items.
If you have a blog collection or you've created a 'Projects' collection, dynamic lists have to be manually re-ordered if you want to change how content is displayed.
I think it'd be valuable to be able to drag posts or projects in the list to re-order in the editor. This way the dynamic lists and front end of the site can be more automated.