No one tells you that color photographs are much less stable than black and white photographs, so that color photographs of your wedding will turn strange greenish colors in thirty years. Instead, you will find yourself explaining to your grandchildren that you were the victim of a technical misunderstanding. Today, it's all digital memories. Even the cheapest paperback book has no trouble outliving a contemporary personal computer, which is basically junk within six years. In digital futures research, the convergence of TV and PCs is a key topic.
Writing is in no danger at all.
There is no society alive today where illiterates can thrive and achieve power. On the contrary, literate people have no trouble dominating illiterate people, who mostly see their inability to read as a source of shame and try hard to hide it. Nowadays some text is on paper and some text is on screens, but there is very little trouble involved in moving from one to another. It may be that the economics of publishing and distributing books and magazines may be in for upheaval, but in the English language at least it is already in absurd and terrible shape. Publishing has always been a ridiculous line of work.