Back to the feature request, if this is taken care of (both adding a missed package, and the S3 upload), do you still believe there is a room for this kind of feature?

Well, I can set import(s3fs) even if I don't really use it in my own code. One problem could be if this happen for a lot of packages, therefore I'd need to add this import to all my entry points of all my repos. While if I just download the right packages from the requirements.txt than I don't need to think about that