I bet this art is not dying, but actually flourishing like never before.<p>The sheer amount of information in the form of websites, books, videos and so on should be a pointer.
I mean just google &quot;mental math tricks&quot;..<p>It&#x27;s true that we can offload complicated brain tasks like number crunching to computers, but people do a lot of hard things also because the process gives them satisfaction.
They climb mountains and walk thousands of miles not because they want to get somewhere, but because it&#x27;s exciting and hard.<p>For this reason, I think people will continue to study and invent new mental math tricks...<p>More people, more free time, almost infinite info available... 
No, this art isn&#x27;t going anywhere ;)