It has huge mindshare, a huge amount of libraries and existing solutions, a huge amount of tools, a huge amount of investment in state of the art VMs, and a huge amount of usage in just about every application of computing (save maybe embedded, a particularly weak application for the language, and even then it probably gets used more than it should). There is no metric by which it isn't one of the most prolific and successful programming languages ever made. I don't even like the language or its environment. There's just no point in denying that it is massively successful and very, very likely to fulfill any need you could possibly have, even if the ergonomics aren't great.