Not entirely. While I haven't done much with the JVM-based languages, I've spent a lot of time dabbling in obscure programming languages (it's a fun and often very educational way to procrastinate), and many language problems are fundamentally social: spotty-to-nonexistent documentation, tutorials or references that are three versions out of date, important libraries on websites that look like ghost towns ("last updated jan 17, 2004"), etc. can kill a language, or at the very least encourage the idea that it's abandoned. A language without a community of people to answer questions, etc. is going to be very hard to use.