<p>Adding this comment as an answer to try and encourage finding consensus on this:</p>

<p>@Scortchi says:</p>

<blockquote>
  <p>I think it's a sensible idea in general. After all if you're searching for topic X, answers about X could be just as useful to you as questions about X. But R in particular should be an exception or everything would end up getting tagged with 'R'.</p>
</blockquote>

<p>This suggests <em>any</em> good answers about X should result in tagging the question.</p>

<p>Vote this answer if you agree...</p>
