I don't buy this comment at all. I've worked with hundreds of Data Scientists, many new to the industry and they all know that R and Scala are important and po

I don't buy this comment at all. I've worked with hundreds of Data Scientists, many new to the industry and they all know that R and Scala are important and popular languages for ML. Majority of Data Engineering today is using Spark, which is written in Scala and even when you write Python code using it you can't escape Java/Scala internals being exposed.