PHP has made huge strides with 7.0+ but honestly a JIT was nowhere on my list of feature requests. We use it at work (with CodeIgniter) and it gives the company

PHP has made huge strides with 7.0+ but honestly a JIT was nowhere on my list of feature requests. We use it at work (with CodeIgniter) and it gives the company a big pool of reasonably qualified talent. For anything outside our web apps, we switch to Python. I find it unlikely that new PHP shops are going to use it to do all the CPU-bound things we aren't using it for now. But who knows? I wouldn't have thought it would be as popular as it is now, if you'd asked me 5 years ago.