Yes, although I did not mention them specifically, loops and conditionals were removed to make PDF a tamer format. However that isn’t really enough. PDF doesn’t

Yes, although I did not mention them specifically, loops and conditionals were removed to make PDF a tamer format. However that isn’t really enough. PDF doesn’t do line wrapping, so most programs create paragraphs by positioning individual lines of text on the page. There’s nothing stopping you from positioning individual words instead, or individual characters. Indeed, that may be necessary in order to achieve certain effects such as full justification of paragraphs, hand–tuned kerning, or mathematical notation. The individual lines, words, or characters do not even need to be in the correct order within the PDF. This means that in order for a converter to reconstruct the original paragraph it must position each piece of text correctly and then derive the original linear arrangement of characters from their positions on the page.