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I also agree that the author is overly critical. He also misses a couple of points.

He talks about SBT, but never mentions Gradle which is a massive and powerful tool that handles Scala just fine. When I worked at BigCorp that made heavy use of Scala no one used SBT. Everyone used Gradle.

A lot of the IDE based complaints the author has would be eliminated if they used Gradle. Now I know Gradle has its own issues, but saying IDE support is missing entirely just because it’s not available with your tool of choice seems incorrect to me. In fact it seems crazy to me that the author has the concepts “build tool” and “JVM” together in an article and proceeds to go about writing hundreds of words without even mentioning Gradle.

He also doesn’t discuss the current issues around Play Framework being essentially abandoned by Lightbend. Play is the most robust and de facto leading framework to build web apps in Scala. There is also akka-http, but it’s nowhere near as mature and has the same issue as Play framework does of being Akka based. I think he does bring up some serious legitimate concerns about the ecosystem now that Lightbend has gated usage of Akka. Akka had a ton of momentum before that.