Interesting blog post - comments anyone?

[Randall Reetz]

No matter what bells and whistles you heap on xtalk, what separates it from the other languages (which of course have the same bells) is the human-ness of the xtalk syntax and the grock-ability of the card/background/stack object hierarchy.  The bells are polish and fit, but the essence is the genius of the whole gestalt so well defined so long ago.  As has been said, it isn't easy to provide a steady and effective business to keep the product topical and working on the endlessly shifting OS/hardware machinery underneath.  That is what a group like run-rev adds.  That the product is elegant, well that is about history and bold genius.