I have six years programming in Scala and I unfortunately agree with everything in this article. Our work experience is very similar; competing approaches/styles, poor tooling, and slow feedback cycles. The language itself is nice is many ways, but it turns out that these things are more important.

We've started using Typescript a lot for http-templating style use cases (instead of Play) and I'd lean towards Go for the pure networky stuff. Combined these give a much better experience than Scala for our types of use cases.