Another factor would be accounting for newness- if a language has a better foundation than other languages and just hasn't been around long enough to have devel

Another factor would be accounting for newness- if a language has a better foundation than other languages and just hasn't been around long enough to have developed those "wide-ranging libraries, extensive documentation and many prior examples/tutorials", it could still be a good long-term investment. Rust comes to mind, and to an extent Clojure (at least if you exclude the Java ecosystem).