Veto, no, but obviously the JRuby team are well worth listening to. Charles's post isn't really saying that refinements are a bad idea, but rather offering some

Veto, no, but obviously the JRuby team are well worth listening to. Charles's post isn't really saying that refinements are a bad idea, but rather offering some, well, "refinements" to how he thinks they should be implemented. It's taken a long time to get Ruby's performance up to the respectable levels it finally achieves with 1.9 and JRuby, so I'm glad to see Charles pushing to avoid letting features creep in which could seriously degrade it.