[luhn]

Similar to the OP, I found pipenv to be quite unstable. At the time (about a year ago) it was really more interesting beta software than the production-quality software it was advertised as. It was also quite a bit slower than pip.

But what really pushed me away is that installing or upgrading any single package upgraded all dependencies, with no way to disable this behavior. (I believe you can now.) A package manager should help me manage change (and thereby risk), not prevent me from doing so.

Poetry is probably the best of the all-in-one solutions. It does its job well but I've found the documentation lacking.

In the end, I've settled on pyenv-virtualenv to manage my environments and pip-tools to manage dependencies. It's simple and meets my needs.