> There seem to be a lot of strange fears from python developers

There you go again.

This isn't fear. It's asking the question of: What. Is. The Damn. Point. Of. This?

I have yet to see a simple, cogent explanation of why this is better than a list of requirements specifying;

pyside==x.y.z

pillow==x.y.z

As opposed to this proposed Thing.

You know what this reminds of?

It reminds me of replacing super simple .INI text files with configuration files stored as XML - change for the sake of it, because Change!

Now, I'd love to see a very simple explanation and justification on why we should all move to this new Thing you're making.

Something like "This new Thing is better because..." , followed by practical /examples/ , because right now, all I see is More Complicated Stuff For The Sake Of It.