[madhadron]

Which modern languages are you thinking about? There's still a long list of stuff in research languages that are not common in industry but are slowly making their way in (think how long algebraic data types and first class functions took to become mainstream, and lots of concurrency stuff that's still being rediscovered), and there's new areas being explored (dependent types, how to do monad transformers gracefully). I would be very sad if we stopped with what we have now.