I think it's not too late to create a modern open-source alternative to PDF.
I find it unacceptable that something that has become so widely used doesn't have proper free tools for editing.
Society shouldn't be limited by income if they want (have?) to use PDFs, or else suffer from a bad experience.
The other bigger problem with PDF is that a lot of the times it's used for something for which it wasn't made to be used for. Anything that is expected to be consumed on both mobile and desktop devices should never use PDFs. Government forms should not use PDFs with hacky embedded scripts either.
