title: Anaconda update downloads all packages?
body: <p>I have Anaconda installed with 1 environment only <code>base</code></p>
  <p>I ran <code>conda update -c anaconda --all</code> and I think it's downloading all packages from scratch?!?!</p>
  <p>It's taking more than 15-20 mins already. Did I do something wrong? I just wanted to update those packages which needed to be updated.</p>