Python packaging, the most convoluted way of creating simple zip files imaginable.

The tool fragmentation is insane, the demand to create "source distributions" was maybe funny in 2002 but just a hindrance now.

Packages no longer build since distutils was ripped out and upstream replaced it with meson etc.

Since building from source no longer works, which is profitable for third party vendors like Conda, "wheels" are uploaded. And they cannot be built on the server since the whole "scientific" ecosystem is perpetually broken. And they are separate artifacts, leading to the above problem.

Shipping checksummed tar archives is of course it not possible, that would hurt the income streams of the package profiteers.