That's a very interesting perspective, genuinely, and I'll have to think more about it.
But my initial reaction is that I think article and section at least have pretty clear meanings:
An <aside> is, admittedly, a bit more vague: is a "note" block in the middle of your text an "aside"? I often use phrases in my writing like "as an aside, ...", but I wouldn't put the proceeding paragraph in an <aside>. So maybe its name is a bit misleading. But I still think it serves an understandable purpose: if I never read the content within the aside, I shouldn't be confused about anything in the article, but the content in it should either enhance my understanding of the content (e.g., example 13 in the spec adds background info about a country that might help an unfamiliar reader) or give me additional functionality, like a sidebar with links or buttons.
I think this is sort of an inherent problem with trying to fit any rigid spec to human language: we want the spec to be written using words we understand, but human language is incredibly fluid and non-rigid, so there are bound to be confusing cases where its unclear which element to use, etc. But I still think there are clear black and white areas, even if there are lots of grays in between.
All that said, I'm interested to hear your feedback, and I'm very interested to read more about the problems people see with the spec; it should be helpful in explaining it better down the line. Thanks for pointing this out to me!
I think part of the issue we run into is that the human language being used to describe this is specifically the language of print layouts like newspapers or magazines. That language was far more known back in the late 90's early 00's but more and more developers are going to be seeing this through web-first eyes.
Your explanations are spot-on though. Even with aside, while we might see it as vague in its contents, you nailed the purpose.
Thanks! And yeah, I agree, the farther we get from the days of mostly-print-media, the less obvious the metaphors become.
I also think with <aside> specifically there are sort of two competing metaphors: the "sidebar" layout element, and the semantic "aside", for tangential info. These are really two very different things, but the spec currently allows for both, which is confusing. As I understand it from some googling, the spec initially only allowed for the semantic usage, and did not recommend using <aside> for sidebars with content unrelated to the main content, like navigation links, etc. But the spec was later amended because of common confusion and the perceived need for a sidebar element to explicitly allow both usages. I'm unsure how I feel about that move.
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