From most of the people I talk to, they rarely complain that scala sold out to industry, but instead talk about how complex the language is. For truly widespread adoption, I'm talking PHP or Java levels, you need to have a totally different mindset. I don't think Scala is that language.
I think achieving PHP or Java levels of adoption is as much about timing and serendipity as it does language features.
Anyway,it's great Scala choosed the JVM because it can be part of the stack of any business that already relies on it.That's what matters IHMO.If it is not fit,one can still switch back to java and still use the jar developped in scala or exploit java libs.