&gt; Looks like it&#x27;s gonna be time for another round of &quot;no, you can&#x27;t write Facebook&#x2F;Twitter in a week&quot; again.<p>Certainly not today&#x27;s Facebook or Twitter, no. But the initial versions were very simple things. Anyone can make a Facebook or Twitter. Not anyone can grow it to a userbase of hundreds of millions of users. That was what was special, not something technical. Scaling wasn&#x27;t an issue; once you have investment and users, you just throw money at the problem.