Many years ago (well, 2017), Terry Pratchett's hard drive with his unfinished stories was crushed, as per his final wishes, by a steamroller.
I remember thinking at the time, "Yeah right, I really doubt the publisher never took a copy beforehand..."
I may even have mentioned my cynicism at the time here on these forums.
Anyway, as I was perusing a bookshop, I spotted a newly released book of 'unfinished work' by TP....
So, it took almost ten years for either the publisher to break, or the family to decide that they needed the money more, and whip out the copy taken before the drive was crushed....