When was the last really transformational idea in programming languages?
njharman: I'm not a language connoisseur so don't know if this meets your paradigmatic quality test and it's kind of old, early 80's, but significant indentation as popularized but not invented by Python. http://python-history.blogspot.com/2009/02/early-language-de...I believe it is a large factor of why Python has/is gaining mindshare in technical but non-programmer fields, education, science.  If true and continues seems transformational to me.