WordPress moving away from PHP to JavaScript

[techlists at phpcoderusa.com]

Hi,

This article says WordPress is moving away from PHP to JavaScript.  I 
think WordPress is shooting itself in the foot.  My main question has to 
do with resources given the shift from server side processing to browser 
based processing.

https://thenewstack.io/why-php-usage-has-declined-by-40-in-just-over-2-years/

Your thoughts are much appreciated.

Keith