[lclarkmichalek]

Any reason they can "fuck off"? Anyway, you're incorrect about pypy. "Real" python developers will likely not run their code in a sandboxed environment, so PyPy's security advantages are minimal, added to the fact that your sandbox is only as good as its configuration. The concurrency is interesting, but there are numerous other solutions available, and that alone makes it unlikely that the de facto implementation of the language would include one. Claiming that PyPy is better on compatibility than CPython is ridiculous; last time I looked, anything using a C extension had to be rewritten to use ctypes. On speed, yes PyPy is impressive. But in python, anything that is particularly CPU intensive should probably be written as a C extension and PyPy takes a hit when using ctypes iirc. In general, I don't see the point of people trying to optimize generic python code. Most code never gets profiled, and most code isn't a problem. At least, not a problem enough to switch interpreter. Definitely not a problem enough to ignore the massive problem that is python 2.x's unicode implementation.