Only someone with no real interest in knowledge and/or the art of the written word cannot understand the importance of keeping hold of the works that have moved one somehow, and cannot imagine the need to revisit at least a passage from a once enjoyed and still loved text.
While there is a sad group buying "show" books which are colour coordinated (usually "complete works" of a famous author), but they are luckily in minority. The most of the "plebs" choose not to buy/keep books at all and/or fill their Billy shelves with CDs, DVDs, and memorabilia from cheap package holidays. They are at least honest in what they do.
And as for the "power of the Internet": it still takes much less time, not to mention the lovely tactile feeling involved, to grab a book off the shelf, flick quickly through the pages to get to that ages ago marked in red passage that you need or just want to relive. Library: this may not even be open when you need it, let alone at arm's length!
Google search and the computer screen are less than perfect substitutes, even if handheld e-book readers do have their place in making it possible to read in "unusual" places, and if back-lit in the dark, too!
But then, sadly, not many seem to understand these finer points about books and their place even in the 21st century.
Sad, but true.
This is the comment I sent in response to the BBC Magazine article linked to in the first sentence. At the time of posting I don't know if it is going to be published, and if yes if it's going to be edited.