Great recommendations all around. It'd be nice if they went into how they handle dealing with C extensions, as that adds a large amount of complexity to a Python project, and most of the published advice on the topic is quite old.
EDIT: Mentioning `pyproject.toml` and the relevant PEPs would also be great (i.e. PEP 621, PEP 517, etc.). Fortunately Poetry is compliant with these PEPs.