Can I PHP? – caniuse.com but for PHP features
caniphp.com
caniphp.com
I'd gladly take a language which offers stability and gradual improvement over a language that just keeps adding new toys to play with. The software development cycle can take many years and from my experience, changes in the language or runtime are a burden.
But my biggest gripe isn't with PHP, it's that cheap web hosting still comes with PHP and MySQL. And I honestly can't blame them.
/rant
But using new features is nice and makes the code better, there are even projects (rectorphp) that can automate using of new features in the existing codebase.
I still don't know that I ever want to write any more PHP going forward but should these efforts continue, I'll need to re-evaluate that opinion.
Then, in 2014, I got a job where PHP was the main language and I was surprised it had improved so much (though I left around a year later and haven't done any PHP since). I find it very impressive that they've been able to address many of the criticisms they received and that they keep introducing concepts that are popular in other languages, all the while mostly starting backward-compatible.
I probably still wouldn't pick it for a project—simply because there are other languages that I prefer or would like to learn—but I respect it a lot more than I used to and understand why many like it.