Comment by edelbitter

> To quantify how disruptive this change would be to existing workflows, the PyPI database was queried for projects that have published new files to old releases

While this may quantify how disruptive the change would be to those projects that are able to and do upload additional binaries to PyPI later, it fails to quantify how many projects already completely circumvent this block before it is even introduced.

e.g. If you tell pip to install from source.. the result may already be that you install a binary that PyPI never saw. A common hack for dealing with NVidia internals, which can explode into a large CUDA major version x GPU arch x platform x implementation x python_version cartesian product. The "extras" mechanism is not quite sufficient to model such combinations.

sample code: https://github.com/Dao-AILab/causal-conv1d/blob/4f6ae4e26ae5... https://pypi.org/project/causal-conv1d/