It is trully a sad news.
I personnally discovered David when I was a young teen in the movie Labyrinth of which I loved the soundtrack. Afterward, I discovered many other albums and I a few of those with all his greatest hits.
I've not had the chance of listening to "Blackstar" yet, but that is on my list of purchase in a near future.
A legend he was, a classic he will remain. His legacy will live on.
Take care.
AJ