Do you think you will ever read every book in your TBR stack?
It is really hard to say because I am constantly adding books to my pile or taking books off my pile. Books I find at garage sales or are recommend by a friend. Books that caught my attention but once I take a closer look I decide that there are far more interesting books to spend my time on.
So I guess my answer is no. I probable won't get around to reading every book I add to my list. While I eventually get to most books on my TBR list, there are always ones I start and never finish. Either because I lost interest in the story, I got distract by another book, or I just didn't like it. I will finish just about any book I start but every once in a while I come across one I just don't care to read.
Which reminds me, I started reading Anna Karenina and only got through the first 3 chapters. I really should give that book a try again. I've heard good things about it.