PDF has its uses I suppose
As the story says, if you just want to print it out like it's supposed to look then PDF is fantastic. Must be great for people who still own printers.
For everything else just no. When Amazon first started selling the Kindle I had this wonderful idea to load our existing technical documents onto it. Nope, they are all PDFs designed to look like A4 and resisted my every effort at resizing to fit the smaller screen. Even trying to edit a PDF is a series of unpleasant workarounds unless, I suppose, you bought a full copy of Acrobat.
It's got so much more difficult recently because of Adobe trying to "cloudify" everything, plus extend PDF far past simple document representation into interactive forms and their own version of electronic signing.
Funny that PDF originated from a way to print tax forms because as it happens the "Agencia Tributaria" (Spanish tax equivalent of HMRC) have done a thorough job of offering their users a PKI-based online tax system. Works well but its weakness is its dependence on PDFs and problems are guaranteed in those bits every time.