Many things

[der Mouse]

> PDF is great for [its] intended purpose:  Creating portable documents
> that can be viewed and printed regardless of the resolution of the
> output device.

But not really any different from PostScript in that regard.  At least
not if you think of the Document Structuring Conventions as mandatory.

> A PDF I create with vector line art looks great on my 10-yr-old 300
> DPI postscript printer, but on a 1200 DPI printer of today it is
> flawless.

And a PostScript file ditto, ditto.

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