I’m not sure if I want to be inspired and try the fine-tuning model part too!
May be Gwern is right that this static personalization approach may not be long-lived. Still, I find it fascinating, and I’m seeing a lot of interest in this area from others too.
When I started, my personal interest was on how to multiply/enhance what I already know and touch adjacent topics/experiences and not really become pseudo expert or the know-all-generalists in things I have absolutely no clue.
Now, shamelessly plugging my idea that I started early this year
It sounds like the context is that Gwern is a writer who wants writing assistance, and in 2026, all the AI labs are working on coding. Writing style is much less important when working on code.
Perhaps if at least one AI lab focused on writing style, we would see how much better they can be at writing? I'm not sure it requires a "digital twin."