[ablob]

The lovecraftian horror of pdf mostly comes into play through the sheer amount of software that supply almost correct pdf. It's not enough to be able to read pdf anymore, you also have to be able to deal with software that emits subtly wrong documents.

[rcxdude]

That's part of it, but the design of PDF really doesn't help

[PunchyHamster]

Adobe really have perfected act of making the most shoddy software that is still possible to sell

[m463]

I'm reminded of "PSD is not my favourite file format."

https://b3n.org/psd-is-not-my-favourite-file-format/

or in the code:

https://github.com/gco/xee/blob/master/XeePhotoshopLoader.m