What I think people figured out is you can port Python2 code to PyPy4. Then for all the testing involved, you remove any potential CPU performance worries and t

What I think people figured out is you can port Python2 code to PyPy4. Then for all the testing involved, you remove any potential CPU performance worries and the GIL in one fell swoop. Those two perks are worth more than any piddly features of Python3, which were already resolved in the ecosystem. I ported to PyPy instead of Python3 and gained those advantages, but can always port to Python3 when/if it ever gains traction. But I'm just as likely to migrate new projects to something else than Python3. I view this blog as a long-form denial letter to himself.