Thinking about it as 'backlog', that is 'something you are supposed to consume and use later' is mistaken I think.
When you think about it as 'external brain' it becomes much more reasonable thing to do. I'm not going to remember everything I read anyway - but I can suspect some content, that I don't care about consuming now (and possibly ever) MAY be useful at some point in the future in some way, and I'd like to skip few steps of consumption (like reading the whole thing, watching whole movie) and use it anyway (have a conclusion, post a gif reaction). It's still transhumanist sci-fi, but it looks doable now.
When you think about it as 'external brain' it becomes much more reasonable thing to do. I'm not going to remember everything I read anyway - but I can suspect some content, that I don't care about consuming now (and possibly ever) MAY be useful at some point in the future in some way, and I'd like to skip few steps of consumption (like reading the whole thing, watching whole movie) and use it anyway (have a conclusion, post a gif reaction). It's still transhumanist sci-fi, but it looks doable now.