<p>@whuber <a href="https://stats.meta.stackexchange.com/questions/1284/handling-suggested-edits-to-posts">recently</a> gave some reason as to why we should avoid trivial edits to questions/answers:</p>
<blockquote>
<ul>
<li><p>Users are awarded badges for making lots of edits, editing old posts, etc. Do you want to encourage abusers who make dozens or hundreds of trivial edits in pursuit of a silver or gold star?</p>
</li>
<li><p>Any edit opens a post up to re-voting: existing votes can freely be removed by the people who made them.</p>
</li>
<li><p>Sometimes even a tiny edit materially changes the correctness or meaning of a post. When that happens, trouble brews.</p>
</li>
<li><p>Edited posts become &quot;active&quot; and appear in the list of questions.</p>
</li>
</ul>
</blockquote>
<p>With the remark that</p>
<blockquote>
<p>Because question titles appear everywhere, a good case could be made for even tiny cosmetic edits to titles [...]</p>
</blockquote>
<p>I think that retagging recent questions is very similar to editing titles of recent questions: the purpose is to clarify things and make the question easier to find in the future.</p>
<p><strong>But what about retagging old posts?</strong> On the one hand, it makes the questions easier to find. On the other hand, we don't want to be flooded by old questions resurfacing because someone added a tag to them.</p>
<p>What is the best practice for this? Only retag questions without (good) answers? Only retag a question if you've made a substantial other edit to it?</p>
