I finally tried out pipenv a few months ago but I ran into a huge showstopper: pipenv does not allow you to target multiple versions of Python. I've seen sever pull requests requesting this feature but the author has officially stated that he does not plan to support it.

My company still primarily uses Python 2, but I've been trying to push them towards 3. I need to support both in the mean time and that simply isn't an option with pipenv. If pipenv truly does die out and something else takes the spotlight, I really hope they include the feature.