Too bad nobody was ever able to build a practical, concurrent programming language on top of parrot. (Nor any well-performing non-concurrent language, for that

Too bad nobody was ever able to build a practical, concurrent programming language on top of parrot. (Nor any well-performing non-concurrent language, for that matter). And quite a few talented compiler writers tried (I'm thinking of Patrick Michaud and Jonathan Worthington at least, probably forget quite a few).