We moved into our house just over 15 years ago.
The previous owners had left a few things, almost all rubbish.
When I went up in the loft I was quite excited to find only one thing left which was a box full of books, because I collect books so I was hoping I might find something interesting.
It was full of books about Princess Diana, written during her life and just after her death.
So someone who had collected books about her, so was obviously interested, within 10 years of her death, had lost interest and put the books into storage. Not only that, but when they'd moved away had decided they were so unimportant that they chose to not take them, as one of the few things that weren't clearly just destined to the bin, to leave behind.
I tried eBay and FB freestuff and couldn't get anyone to even take one. Even one of the free book sites locally that I offered them to said they didn't want them! I took them to the charity shop in the end, so not sure what they did with them.
I think it's unlikely that if people who clearly found her interesting during her life time had lost interest within 10 years, that many youngsters who have living people to be interested in, will have more than a passing glance at her.
My dc (aged 25 down to 19) have no interest in her at all.