Not all, but php is great. Using curl to talk to external APIs is so easy and then use json_decode and setcookie - all easy to toss objects and data around, readable, immediate.

Yes JS has caught up mostly, but jquery... the way it looks when scanning my code is more symmetrical. Jquery paints a better "shape" representing the output. Speed reading the same code over and over trying to squeeze that new feature in, I need to snap-see what things are doing and jquery makes that "snap" faster for me.