Just that, really.
We had some stuff in storage while we're having some building works done at home, and everything was completely destroyed in a huge fire at the storage unit on New Year's Eve.
Some people have lost literally everything they own, so I am trying to feel lucky that we have "only" lost a relatively small proportion of our belongings.
BUT amongst other things, I've lost every single book that I owned. I'm gutted. A collection that I've built up over the last 30 years or so. Books that I've cherished and loved. Maybe 200-300 in total 
I already have a kindle, and it's useful, but I don't love it in the same way as actual physical books.
So: if this were you, would you try to replace your collection, however gradually, via a mixture of second hand and new?
Or would you just think fuck it, it's fewer bookcases to dust and less "stuff" in the house - and just buy everything (eventually) on a kindle instead?