The pythonwheels.com site measures the adoption of new tech by package maintainers.

From the other direction, it would be interesting to measure the adoption of packaging tech by users.

• Is everyone on the latest Pip version?
• How popular are wheel downloads compared to source distributions?
• Does anyone still use easy_install?
• Does anyone download eggs?
• How many people download packages from the web browser?

It might be possible to learn this from PyPI with the right logging. Pip and easy_install have distinct http user agents which include their precise version numbers.

• https://pypi.python.org/pypi/numpy
• https://pypi.python.org/pypi/requests
• https://pypi.python.org/pypi/pytz