I often make a challenge in order to visually see how far through my physical TBR, or planned reads I am, but I find it quite time consuming to create challenges and add each book to them. I'd love to be able to filter my TBR and add all results (or first 50 or something if you need to cap the number of challenge prompts) to a challenge. for example, filtering TBR by owned hardbacks, maybe with a particular genre or tag, and add them to a specific-book challenge.