To be fair, it also needed eight years to get here, PyPy inherits much standard lib code, and the py3k effort wasn't limited to the interpreter but also involve

To be fair, it also needed eight years to get here, PyPy inherits much standard lib code, and the py3k effort wasn't limited to the interpreter but also involved a lot of standard lib development :-). So, apples and oranges. Still, amazing work by the PyPy folks any way you look a it.