I remember he came to my school and talked about beagle when I was in my early teens and I found it very inspiring - part of the reason I'm working in tech today.
A very inspiring guy, RIP
I wonder what caused it? I know he'd been battling MS for the last decade nearly. Can these things just happen randomly?
Basically yes. Assuming it was caused by an aneurism, then this is something that for all intense of purposes can be considered random.
Yes I know nothing is truly random, but being born with a inherent weakness in an artery in your brain is as close to random as anything.