Bollocks. People in the alternative JVM language space have been hankering for all sorts of VM changes/additions for years, including TCO, fixnums, method hand

Bollocks. People in the alternative JVM language space have been hankering for all sorts of VM changes/additions for years, including TCO, fixnums, method handles, continuations, etc etc etc. How many openJVM+ implementations have ever been implemented, nevermind used out in the world? None, AFAIK -- the progress, as it is, happens in the MLVM, which is under the umbrella of OpenJDK. So as I said, the exceptions to this might be highly VM vendors, such as Azul, GAE, and various people that have worked on (maybe deployed, I don't know?) full-stack Java operating systems and/or Java-on-a-chip (for embedded applications I suppose). Anyone developing applications, libraries, et al. are entirely unaffected AFAICT.