> No Core Proprietary Stuff: Rye (with the exception of it's own tool section in the pyproject.toml) uses standardized keys. That means it uses regular requirements as you would expect. It also does not use a proprietary lock file and use pip-tools behind the scenes.

The use of `pip-tools` to generate a `requirements.txt` as a lockfile is a big negative for me. Last I looked, they do not generate a cross-platform lockfile. In theory, you could still use `requirements.txt` for a cross-platform lockfile; it just might be a mess for doing incremental updates like when adding a new dependency.