That&#x27;s the case with most technologies.<p>I managed to skip the whole Angular&#x2F;Mongo hype, and now that I&#x27;m actually getting back into frontend development, it&#x27;s all about React.  Can&#x27;t say I missed it.<p>I remember telling my boss at my very first job &quot;Yeah, I want to learn MFC and COM&quot;.  His response was &quot;Why?  By the time you&#x27;re out of college, everything will be .NET.&quot;  It turned out he had underestimated: by the time I graduated from college, MFC &amp; COM had been replaced by .NET, which had been replaced by webapps running under J2EE, which were just about to be replaced by Rails &amp; Django.