Efficiency isn&#x27;t everything, by the way.<p>Effectiveness is another important metric. Can filesharing give me access to all those millions of books that have never been digitized?<p>No? So I guess libraries can do something that filesharing can&#x27;t.<p>I won&#x27;t go so far to claim that filesharing could never give me a perfect replica of Bembo&#x27;s &quot;De Aetna&quot;. But it doesn&#x27;t today.<p>See? I can defend libraries on another criterion than efficiency.