PHP has improved since in a way that is rarely considered when reposting it, but JS has some deep language horrors of its own still, and many novel JS horrors like NPM have emerged largely since the Fractal article was published.
As the King sang, so eloquently: o/~ clean up your own backyard o/~
PHP is no longer a terrible language- recent editions have made leaps and bounds on language features, and the ecosystem around Symfony is great. But on a weekly or monthly basis I run into something that makes me want to head-desk.
JS's recent(ish) language improvements like `let` and ESM have been much more fundamentally significant than PHP's IMO, where we're still stuck with bad scoping and Java-brained class autoloading.
*Not leagues apart in terms of productivity. I can certainly get a lot done with PHP. I mean leagues apart at their foundation, the basic concepts at work in the language. Most of that can be ignored until it rears up to harass you. Here's a great example of something similar to an issue that bit me last month:
As someone who’s written a lot of php and JavaScript, I think the same thing but in the opposite way. JavaScript just can’t compare when it comes to designing a complex OO system.
Adding properties to an object is fine IMO. Arbitrary properties and prototypes are, to me, a much cleaner system than PHP's somewhat confused mix of array, object and class. The lower you go in JS the more unity of concepts there is, whereas the lower you go in PHP the more hacks you discover.
All of the above said, I would prefer a string concatenation operator to overloading +. JS template literals mostly solve that for me in practise. And what I really actually want is an equivalent of Haskell's <> or mconcat, which concatenates anything monoidal - strings, lists, etc.