Sure if you are talking about a few dozen books. But over the years I have collected, shall we say _dozens_ of books that are keepers. To have them suddenly,

Sure if you are talking about a few dozen books. But over the years I have collected, shall we say _dozens_ of books that are keepers. To have them suddenly, without warning evaporate for no good reason is simply an untenable situation. Especially since, as digital files they should be disaster proof, unlike several boxes I lost a while back due to water damage. But even more to the point. Books, the written word in general are important. Very important. Do we really want to encourage the development of a system that effectively puts a "kill switch" on knowledge?