[Zak]

It's a response to this, which does advocate the use of literal plain text files where possible: https://sive.rs/plaintext

The author mentions converting to other open, text-based formats like HTML and LaTeX for publishing and writes:

> Keep your graphics files alongside your text files. But keep your text as plain text.

[pdonis]

> It's a response to this

Seems more like a misunderstanding of it than a response. As you quote explicitly from the Sivers article, he is talking about keeping text as plain text, not about keeping images as plain text. And the Miris article is basically saying the same thing (at the end he even says plain text is still his first choice), yet appears to think he's giving some kind of opposing viewpoint.