It’s not as clever as the author hoped.
I would say Ruby on Rails was a 10x on raw PHP in terms of feature specs per hour and AI is a 10x on Ruby on Rails (and its derivatives).
We're probably 100x the developer productivity on a per developer basis from the early days of Web 2.0 with PHP, just a personal anecdote though.
Only if you compare create a website in PHP 20 years ago vs using wordpress. But to create a project like wordpress from zero now is as difficult as it was 20 years ago.
Roll to disbelieve on this one. There's no way that creating something like WordPress 20 years ago, before any modern-day web application frameworks, was anywhere near as easy. I'm not even talking React/Next or whatever - this was before RoR, before Django (or at least very early versions of both).
I think it's pretty impossible to look around and not notice that technical advances have improved a lot of things in the world - why does it sound credible that programming itself hasn't improved at all in twenty years? Even look at languages like C++ today compared to 20 years ago, they're massively different - do you think all those changes to the languages are neutral or negative in terms of productivity?
This specific point is patently untrue. loveable/v0/etc excel at creating CMSes / UIs for content in hours.