Apple, however, are not the only ones that are eliminating printed User Guides. This seems to be the norm now when it comes to software. Helps files are no longer downloaded with products, but remain on company servers to allow for immediate updates and corrections. Access to help files now allows a user to have the most up to date version at the time of the search. Using the web versions allows for singular page prints if necessary, and the iBooks version provides for bookmarking what the user considers important pieces.
I seldom produce a printout on paper, but I find the the PDF format easier to read than the currently available iBook and HTML versions.
The 'Contents' of the iBook version has only the main headings, e.g. 'Basics', and it can only be viewed on a separate screen. The main text is continuous, and can be scrolled up and down.
The HTML (Web) version has additional, lower-level, topic headings, e.g. 'Basics: Use Apps, Multitasking, ...', and these are always visible in a navigation pane at the left. The main text can only be viewed one topic at a time.
The PDF version (as was available for iOS 6) has a better combination of features. There's a conventional Table of Contents at the top, a navigation pane with a hierarchy of topics at the left, and the main text can be scrolled continuously.
I suppose companies don't want to produce hard-copy manuals (but why not? - you can buy print-on-demand books). But it wouldn't be too difficult or costly to produce PDF versions of manuals. If it's beyond them, I'd be happy to do it for them (as described above) for a nominal fee. 🙂