> Rarity: If text is not online, it doesn't exist.
Be careful with that line of thinking. Time and again throughout the history of the digital age, data has ceased to exist precisely because it was in a digital form. Consider this remark from the US National Archives: "By the mid 1970s, when computer tapes for the 1960 census came to the attention of archivists, there remained only two machines capable of reading them. One was already in the Smithsonian. The other was in Japan!" An entire task force now exists at the National Archives (http://www.archives.gov/era/papers/preservation.html) to address the problem of expiring data formats (old cassettes, magnetic tape, etc).
Take the following hypothetical: if Google goes under sometime in the next decade, and takes all of its data with it, the thousands of volumes that have been archived by the Google Books project will persevere only because university libraries around the world have copies of them on their shelves. Data continue to exist even when they're not immediately available to us at our terminals.
[And this is most certainly not the forum for this, but if I'm reading between the lines correctly you seem to be speciously implicating that Judaism was surpassed by Christianity as the predominant western religion because of its failure to embrace the printing press, but I would point out to you that a.) I own a lovely bound copy of the Tanakh, published by the JPS and available from Amazon for the low low price of $23.10, b.) the total number of adherents of Christianity had leapfrogged Judaism by at the latest the 4th century--a full millennium before Gutenberg--and would only continue to skyrocket seeing as it was the de facto faith of a sprawling political empire, and c.) Judaism is an inherently non-evangelical faith, so talk of such competitive tallying is really irrelevant anyway.]