What happened was that Kenneth Reitz socially-engineered his way into the PyPA to get his tool blessed. The community lashed out (since the tool had obvious shortcomings and a somewhat dubious development process) and recommendations were softened. Eventually the PyPA had to take over pipenv when Reitz had other issues, and they are now forever burdened with what is a bit of a dud.
[1]: https://github.com/pypa/pipenv
[2]: https://github.com/pypa/pip
[3]: https://github.com/pypa/virtualenv