I agree. One additional detail to notice is the use of horizontal space. There are several different widths being used, depending on the type of content. (I'm on desktop.) I like the varying "full-width" image sizes, as well as the footnotes on the side. But most exciting to me is how the content gets wider for side-by-side image and text components, such as the early MS-DOS CLI screenshot. This component uses the extra horizontal space that it needs to, while maintaining flow with the rest of the writing above and below it. It's elegant and I believe it's an innovation. After experiencing this post, the typical blog or article layout crammed into a fixed-size column seems straitjacketed. It's inspiring.