Your pet theory is questionable, as the JavaScript (ecosystem) is one of the oldest that's still wildly used everywhere.

The big libs have been pretty stable for the last decade though, even if the ecosystem itself feels quiet messy, likely because there are so many interested parties, each having their own ideas of how it should be.

And it's also often the first language for a lot of beginners. ..

Users of "real programming languages" have peddled this narrative for decades.

They are so mature and everything JS is just child's play...

Eek. 1) I use JS/TS every day. 2) There are a great many people who are familiar with multiple languages, their ecosystems & culture, their history, and finally how they compare to each other.

To imply that if you are critical of JS, you must be "on the other team", is a false dichotomy.

I have been half jokingly saying they’re rewriting php.

Good, PHP is an inconsistent intractable pain. Who thought referring to functions by the string value of their name was a good idea?