&gt; how many people have actually went and dig into the Atom code and changed something in a core of it?<p>More than 1144: <a href="http:&#x2F;&#x2F;blog.atom.io&#x2F;2016&#x2F;05&#x2F;06&#x2F;two-years-open-source.html" rel="nofollow">http:&#x2F;&#x2F;blog.atom.io&#x2F;2016&#x2F;05&#x2F;06&#x2F;two-years-open-source.html</a>