Andy Grove: Rich, Famous, Smart and Wrong (2007)

“But in the treatment of Parkinson's, we have gone from levodopa to levodopa. ALS [Lou Gehrig's disease] has no good treatment; Alzheimer's has none.”

Almost 20 years later and we’ve made little progress.

Andy Grove did make an effort with Parkinson’s, which he had:

https://www.forbes.com/forbes/2008/0128/070.html