Well, I do take interest into matters that happened while I wasn't aware of the world around me.
Inching close to the fourties - when I listen to folks like McKusick talk about the early days I really wish I'd be born a decade earlier.
If your book is 20 years old I am incredibly grateful to your legacy and contribution. Really.
A bit of context can be found at my blog.
I really feel humble to be standing on the shoulders of giants like yourself. Really - thank you.