I agree. Server-rendered React can also send down 100% HTML apps.

But I 100% see where the author's coming from, considering the massive fragmentation of react codebases/patterns and decision paralysis of React development in general. I really doubt most React apps, even the more accessible ones, are testing their multi-page form wizards with JS completely turned off.

HTML-first does seem highly underutilized in the commercial web, and I learnt a lot from reading this (as a solidJS/react dev).