Earlier quoted context omitted.
My view is perhaps even more cynical than yours: I think his longevity is primarily due to luck. He also, if I understand correctly, has a different variant of ALS that doesn't progress as quickly. While money might have been a necessary precursor to his achieving such longevity (I doubt he would have made it this far had he not been wealthy), ALS has taken the lives of many, many people poor and rich alike. My stepf…
I suspect you're right. Money isn't the issue here; it's luck of the draw. My best friend's father died of ALS two years ago, and like your stepfather, he was very successful, wealthy, and motivated. He was also professionally and personally productive up until the last second. As I recall, his disease progressed like a step function whose "steps" were of indeterminate length. He'd lose some functionality, then remai…
After her diagnosis she attended a few support group meetings, and it was striking at how the disease progressed differently in different people. One man had been diagnosed years earlier and was still able to do work around his farm and house, he seemed almost normal. Others were in wheelchairs and could barely talk, and had been normal only a year earlier.
I wouldn't call Hawking lucky as the disease is absolutely a terrible thing, but given that he has it, his remarkable longevity does seem to be on the lucky end of the statistical distribution.