I don't know. I was shocked to hear about David Bowie, but I don't feel that pseudo-closeness to rock stars that I did when I was a teenager. He died of natural causes, surrounded by family. I tend to get a lot more upset by sudden death, murder, suicide, etc.
I feel like I'm absorbing the sadness of the whole entire world, but I think it has to do with the awful state the world is in right now. So much sadness and loss, and the new year brings it all into stark focus. "Happy new year" is anything but.