Your first paragraph makes a very good point. I could understand that as an impulsive motivation. Thanks.

Yes, I also don't want Markdown turning into a binary format. Absolutely. In fairness, I can see the risk of that in some situations. e.g. my professional obsidian vaults are so heavy on JS and custom plugins that the render is significantly detached from the source text, using dynamic elements. I guess I could see an unfortunate world where people push into that. But I only really see that as if it is a complete replacement for other document formats, which I don't think it is. It's sort of like text++ rather than odt--

I don't see markdown replacing advanced formats in all cases like that, but I think it's sufficient, even in its most basic forms, for the vast majority of people.