He blogged at <https://jakeseliger.com/>, and numerous of his blog articles were submitted to HN: <https://news.ycombinator.com/from?site=jakeseliger.com>. That includes numerous topics, over the past year or so his experience with cancer, often concerning frustrations with the process and mechanism.
His essay on agenticness especially strikes me as hugely insightful and underappreciated. It was submitted several times to HN but saw little discussion:
<https://jakeseliger.com/2024/07/29/more-isnt-always-better-d...>
Jake's wife, now widow, Bess, blogs at Everything is an Emergency: <https://bessstillman.substack.com>. That also details the cancer / caregiving experience, from the point of view of a wife, caregiver, expectant mother, and emergency-room doctor.