[codeonfire]

Groovy's problem is that it is the "anything goes" language. There is the eternal September problem of new people entering the industry, and for the first ten years of a person's career they think that more complex, more verbose, and harder is somehow better. Groovy provides syntactic sugar for much of java, but that is going to be seen as a negative for people who compulsively have to type out long form code or use the most complex language feature they can. In ten years people would have forgotten about Groovy, because Python has already won over so many communities. No one complains that Python is slower than Java or not as complex as Scala.