Yeah, I think for the most part I also don't register chapters, or I'll register chapters as scene changes but not as structural changes. Most of these I listed are exceptions, I think, because they do something architecturally interesting that makes you notice them as separate narrative components. Something in the way the story is told, or something about how this piece of narrative is set apart from the rest of the story, that is deliberate and which is memorable and interesting and helps the story work.

But not always. I don't think there is anything about the 25th chapter of Memory that is particularly distinctive in the storytelling, except that it's such a beautifully constructed storytelling moment where Miles enters the chapter as one person and exits as a completely different person.