JavaScript churns more than Rails which churns more than Elixir/Phoenix.
I believe this is caused by “how sound the fundamentals are” (technical debt in the language itself and its stdlib).
For better or worse, you can take 10+ years old PHP code and it'll mostly just work.
I rewrote it in React for fun and not only is it totally out of date, but Github's dependabot has sent me probably 200+ security advisories based on its dependencies.
Meanwhile, I've had the misfortune of inheriting a React application that would no longer build a mere six months after the original developer left the company. I've come to loath working on React projects due to the insane amount of library and tooling churn in that ecosystem.
Glad to hear those changes did not impact you re PHP