I got to know Dick York for a few years before he passed. He was kind and very open about the show, his many issues and regretful for the heavy cigarette habit that eventually claimed him by emphysema. He said the Bewitched years were some of the best of his life and enjoyed performing with his talented co-workers. Modern medical approaches may have made all the difference yes, IMHO.
I found this 1989 LA Times column that shows what a kind man he truly was. Thought you would enjoy it.
https://www.latimes.com/archives/la-xpm-1989-02-08-vw-2079-story