Thanks for the retrospect. I always think Dart has lots of potentials. It could be a great general-purpose programming language, as versatile as perl/python/ruby while tens of times faster than them all. Unfortunately, the dart developers are too obsessed about web programming and reluctant to embrace the bigger world. It is really a pity.

PS: when dart came out, javascript was already blazingly fast (as a dynamic language) and largely usable. Dart is indeed better but not that better to revolutionize web programming. On the other hand, most general-purpose programming languages are very slow even nowadays. Pypy is faster than CPython, but not to the level of V8, dart, julia or luajit. A capable JIT compiled dynamic language may change how we program. Dart was the closest, but missed the target.