<p>In favor.</p>

<p>Looking at the recent questions with these tags, there seems to be no pattern which get tagged <a href="https://stats.stackexchange.com/questions/tagged/neural-networks" class="post-tag" title="show questions tagged &#39;neural-networks&#39;" rel="tag">neural-networks</a>, which get <a href="https://stats.stackexchange.com/questions/tagged/deep-learning" class="post-tag" title="show questions tagged &#39;deep-learning&#39;" rel="tag">deep-learning</a>, and which get both. On the other hand, there are questions tagged <a href="https://stats.stackexchange.com/questions/tagged/deep-learning" class="post-tag" title="show questions tagged &#39;deep-learning&#39;" rel="tag">deep-learning</a> that have absolutely nothing to do with it. Making deep learning an explicit synonym of neural networks might (hopefully) even prevent some users from using the tag for any learning (that perhaps feels deep to them, or whatever was their reason for using that tag for questions like <a href="https://stats.stackexchange.com/questions/402549/should-oob-out-of-bag-error-be-less-than-a-test-set-error-in-random-forests">this one</a>).</p>
