[runT1ME]

I'm a Scala fan, so know that up front, but I don't think Scala is unreadable outside of language fanatics, but the language itself is definitely more complicated than Java/Kotlin/Go etc.

We've had a lot of success bringing people unfamiliar with the language (even with heavy usage of Scalaz) because we try to maintain the right ratio of "Scala experts" to "new to Scala". We end up with 1 to 7 more or less, and it seems to work well.

As long as there's enough resources to steer people away from writing ugly code, the payoff can be quite nice. I have never seen a null pointer exception, almost all of the issues we see in staging/dev are related to JSON/REST,and the only issues we've seen in production have been performance/latency related. Scala really allows us to narrow down the type of bugs we get.