I think the author neglects one point: Deciding what to keep and what to throw away is a really difficult problem. Why is that so? Because to do it 100% correctly, you would have to know the future. Because only then you can know for certain what is worth keeping. You don't know the future so you will err. Now, in times where data storage is almost free, it makes sense to keep an ever growing but well-ordered set of files or bookmarks. It has saved me lots of time, just searching my bookmarks "I remember this article I once skimmed, and it contains exactly what I need" or even "I remember this book I downloaded, I'm sure the answer is in there".