SL-OBS has the feature and it's the only thing it has over OBS-Studio IMO. Been hoping for a while this feature would be implemented soon as it's a pain to have 1 scene collection fully optimized, then having to duplicate that scene collection and changing things out and putting things back in to make it match a previous scene collection that I had and wanted to update, but couldn't simply copy-paste things from the newly-optimized scene-collection to the one I was trying to update