It's a nice article about a topic I care a lot about (the need for rediscovering hypermedia, and about the magnificent Datastar library/framework).
But I fear that the comparison is less SPA vs Hypermedia than a specific nextjs app on vercel versus a specific php app on a vps. And that people will justifiably give people reason to dismiss the whole thing outright.
If anyone is inclined to do that, I really urge you to look at Datastar's website and examples to see what it is capable of.
Also to read infrequently.org for far more about spa (especially react) vs hypermedia + progressive enhancement.
The underlying architecture matters little when the SPA requires several seconds of main thread work after downloading various "blobs" of minified java script..