His basic argument hinges on incorrect division of devs into Java/OOP crowd and Haskell/FP crowd. There are plenty of Scala users who don't fit these stereotypes though. I personally very much appreciate the unique mix of OOP and FP that Scala allows for.

For me Scala is a very general and a remarkably unopinionated language. It efficiently encodes and integrates multiple programming paradigms in one language, letting you pick and choose what makes sense to you.

Scala is useful to a wider range of programmer preferences and skill sets than any Haskell-on-the-JVM could ever be. It's a feature, not a bug, both for individuals and enterprises. Pure FP is just some people's preference that requires a significant buy-in, not the one true way of doing things.

In general, this talk just seems like a case for one man's preferences rather than a fair summary of Scala's current market situation.