He is handwringing about single-page applications. SPAs have been kicking around for, what, a decade? Let's be real--in this article the single-page application complaint is a proxy for "I don't like JavaScript" and he's entitled to that opinion but it is certainly not "experimental"; JavaScript is not going anywhere, it is well-understood both in browser and on the server, and the libraries and ecosystem are not going anywhere either--if Facebook died tomorrow there would still be React jobs in 2023.
There are parts of current software development that really, really suck. The author does not capture them; this is "new things are scary" complaining and very little more.