The author seems to think that there's only one type of user of these tools. Namely people who use NeoCities. They're all that matter to him.

Way back in 2015 I was building a large static site using Jekyll and Wordpress CMS as a backend. We had 30+ content editors using it, writing Markdown and I had Jekyll Generator that would execute a SQL query against the Wordpress database to build static content. Every new post would build and deploy the whole site in 2-3 minutes. Over 50k pages of content. This powered a very large marketing website straddling multiple top 10 Google Ad keywords. Business was bringing in several hundred million in ARR.

I knew of at least 3 other similarly large businesses doing this. All the way back in 2015. My current company today builds a static site from a Wordpress backend and I was totally uninvolved in this work (or even suggesting it). The user that this author thinks is a fable is very very real. There is absolutely a market for a CMS backend for an SSG.

Not that I as a developer would have used it, but if my employers could have paid a company for what I built in a nice box instead of paying my salary, they would have.