Last I saw, there were over 1500 issues in the project's GitHub issue tracker. Even assuming a lot of those may no longer be relevant, and assuming minimal growth, that's still not a small number of potential problems to deal with.
And we're still seeing disruptive/breaking language and library changes, like the box-related ones recently. I know, I know, I've heard the "let's break it now rather than later" argument from you guys before. But these kind of changes don't instill confidence.
2014 is nearly half over. I know that production-grade programming language implementations don't just happen over night. It takes a lot of effort, a lot of thorough testing, and many bug fixes to result in a truly stable release. All of that takes a lot of time.
While I'd like to be wrong about this by the end of 2014, the current state of affairs is not very encouraging.