Alas, I feel the same way. After much thought this weekend, I concluded that it was time to move on from PHP. I decided against the any other scripted language (Ruby, Python), as it felt like more of the same.

Requirements were strict typing, functional programming support, built-in concurrency, decent library support, and real support for both native and Javascript. It pretty much came down to Kotlin or Rust.

I really want to like Rust more, but the library support, and the jobs in my area just aren't there (yet?).

Picking up Kotlin feels like coming home.