(I wrote the original post) I'm a developer, but you can call me a marketer if you want. I don't think it changes the point of my post.

The point was that bad abstractions can be easily replaced by AI now, and this might work well for some people/companies who were in a similar situation as me. I was not trying to say you don't need a CMS at all. In fact, I recommended most people still use one.

What you describe as an "extremely brittle proprietary system" is working great for us, and that's all that I care about. I don't "love to build software" for the sake of building software. The post is about solving a problem of unnecessary complexity.