I've been wanting to get new carpet for some time now, but I have to admit that the biggest reason not to is furniture shifting. It would be bad enough having to move beds, chests of drawers, couches etc, but I can't bear the thought of the bookcases. Because I'd have to take all the books out first. So instead I had the carpets cleaned, and left the bookcases where they were.
But it does mean shifting a lot of stuff, and then you start looking at it all, piled up in the spare room, and wondering why on earth you have most of it, and surely it could all be thrown out or given away? And then it gets back to the books. Do I need that many? Will I read them again? Many of them, yes, I will. All of my nonfiction is mostly for research, and I have a lot of kids' books from when I and my daughter were young. (And some from my grandfather's era.)
I also use a lot of my books in class - I put excerpts in my class readers for discussion, I read bits out loud as examples, I pass them around for students to look at (but rarely lend them, I have to admit, having learned that around 50% never come back). But still ... probably 20% of my books could go. Somewhere. To a good home. To the charity shop. To friends. But can I do it? No. I can throw out most clothes without too much angst, get rid of old knicknacks, TVs and videos that no longer work properly, even CDs that I am sick to death of.
Books? Getting rid of books is too hard. Buying more is way too easy. Something has to give. I might have to grit my teeth soon and weed out my shelves. Soon.