TAOCP has <i>not</i> been written, several volumes of it have.  It remains to be seen whether Knuth will even be able to finish what he set out to do, let alone include new things.<p>&gt; faster than can be documented.<p><i>By one person</i>, I wrote.<p>Here&#x27;s one that I think is interesting, difficult and evolving: distributed systems.  This shows interesting work happening with version vectors, for instance, over the past 15 years: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Version_vector" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Version_vector</a>