[metaphor]

> When the page is sufficiently narrow, revealing sidebar items is done via small clickable elements: if the user has never seen those before, I expect they will miss out on them.

Absolutely this!

Upon seeing sidenotes and before reading the article, my first instinct was to see how these elements would react in full v. narrow, and was immediately turned off with how information appeared to wholesale disappear.

Thanks for sharing your blog as a contrasting implementation...so clean and beautifully nuanced.