> * PDFs cannot easily express interaction. PDFs were primarily designed as static documents that cannot react to user input beyond filling in forms. I am glad

> * PDFs cannot easily express interaction. PDFs were primarily designed as static documents that cannot react to user input beyond filling in forms. I am glad about this, I do not want to download a document and it require any input. a document should be a document, nothing more. If I'm getting a book to read (pdf), I expect a book, not a webapp.