On: Library-managed 'arXiv' spreads scientific advance...

[lorenzhs]

I'm not sure whether you're serious, but on any article's page there a "Download" section with a link to the PDF (labelled "PDF").

[baby → lorenzhs]

Not always.

[GFK_of_xmaspast → baby]

Can you link three examples.

[greeneggs → GFK_of_xmaspast]

Here's an example: https://arxiv.org/abs/1611.06999

I believe the PDF link is only removed after a paper has been withdrawn. But if you click on v1, you can still access the original paper (incorrect, in this case).

[lorenzhs → greeneggs]

v2 is a 0kB file. As you note, v1 is still available, just as with any other paper that was updated.

In any case I don't think that withdrawn papers support the OP's claim that PDF links are hard to find for normal papers.