The fan-less nature is a great design pattern
Nope, he pretty much died right on time in terms of median life expectancy for his form of cancer: https://pancreas.imedpub.com/prognostic-factors-in-patients-...
There's no record of Jobs being anti-vax (your comment is already the fifth Google search result for "Steve Jobs anti-vax", and the top four are nothing to do with him being anti-vax.
As for "eschewed almost all forms of modern medicine": completely false. He delayed surgery for his cancer - which was of a form that was known to be slow-growing and not especially lethal - for just 9 months, then decided to have conventional surgery. This is not "eschew[ing] almost all forms of modern medicine". It's just delaying for a relatively short period.
He later spoke of his regret about this delay to his biographer, so others would be warned against doing the same thing [1].
Even still, he lived for another 8 years after the diagnosis and was in good health for most of it.
Some experts dispute that his approach likely caused his death, and even suggest it might have extended his life [2].
[1] https://www.forbes.com/sites/alicegwalton/2011/10/24/steve-j...
[2] https://www.livescience.com/16551-steve-jobs-alternative-med...
Personally I never much liked VAX myself, but that was primarily because my first experience of it was with VMS, and I'd previously used Unix. The difference was jarring.
Later in my career, I had no choice but to use VMS on an Alpha cluster, and grew to really appreciate it.
https://centerforhealthjournalism.org/blogs/2011/11/10/what-...