WordPress isn't moving away from PHP, you'd have to be completely unaware of WP to draw that conclusion. For starters, the REST API that will power JS based cli

WordPress isn't moving away from PHP, you'd have to be completely unaware of WP to draw that conclusion. For starters, the REST API that will power JS based clients is built in PHP. The actions and filters API which is the bread and butter of thousands of plugins is all PHP.