I also disagree with this article's approach, but it seems pretty disingenuous to say that they don't understand terminal input because they didn't mention readline. After all, this is a blog post on the site for a terminal implementation. They'd have to be unbelievably ignorant to not be aware of the role of readline here.

They're not writing a technical deep dive, they're presenting their vision for a different approach. I think that vision is flawed but I'm not going to grade them on how deep they get into implementation details.