I will never relocate just to change programming language.
> Do your coworkers never have to go in and maintain your code? What about after you leave?
I wrote an extension to our core app that is needed by 2 customers. Someone might need to touch it again one day, but it's more likely that a new spec will demand new engineering for a new solution in the future, at which point the most favorable technology will be used. That goes for me or the next person.
> Do you not have to pull request the code before it's merged in?
No. I'm a full-time employee and a core committer. We already have extensions in Java, Groovy, (very limited, nearly dead experiment) Jython, and now Clojure. Technically my extension is Java and it is a thin wrapper to a Clojure library.
> At the end of the day it IS just a jar, but that ignores all the non-runtime aspects of coding.
They are de minimis in this case. It survived review with nominal eyebrows raised. It's a Java shop but they're familiar with the family of other JVM languages.
HTH.