Right now we're trying to decide if JRuby should upgrade from Java 1.4.2 to Java 5. There are some compelling reasons for this, but I'm not a 100% sure it's a good idea. Any comments from my readers?
In practical terms, this will mean that JRuby 1.0 will continue to be supported on 1.4.2, but new development will only work on Java 5 or higher. There is talk about using retrotranslator for handling 1.4.2 compatibility in later versions.
So. Please, comments and opinions!