That strikes me as spectacularly unlikely. JRuby and MacRuby aren't in competition; they meet different needs and have very different usage scenarios. There's

That strikes me as spectacularly unlikely. JRuby and MacRuby aren't in competition; they meet different needs and have very different usage scenarios. There's no challenge or threat. Ruby interpreters are not a There-Can-Be-Only-One Highlander scenario. You more or less have to be trying to imagine the most wildly cartoonish and improbably malicious motives to think otherwise.