Bear with me here when I say this. I'm kinda glad he died. Not because I hate him or anything - I love the guy. But he' had Alzheimer's for years and has really gone down hill. Google some of the last pictures of him and prepare to be sad. He and his family had to have been going through some hell lately. It's sad that he's gone, but he's no longer in any pain, regardless of how you feel about an afterlife.
I still haven't watched Young Frankenstein; I will amend that this weekend.
I remember years ago seeing him appear on a show my mom was watching and going "holy shit, it's Gene Wilder" because it'd been so long since seeing him, and it's been long since even then. May he be at peace.