PHP's drop in "popularity" mirrors the post-2010 enshittification of the Web.
The longer I am in this industry, the more I believe the monopolists spread FUD about it because there is nothing more dangerous to them than a dominant Web stack that cannot have its value captured & extracted by one of them, yet is capable of spinning up competitors overnight by a labor market they haven't homogenized & deskilled.
#PHP might be the most dangerous Web tech for capital.