The "P" in Progressive Web App:
https://infrequently.org/2015/06/progressive-apps-escaping-t...Reminds me of the "P" in Progressive Enhancement: https://blog.tomayac.com/2020/01/23/progressive-enhancement-...
There are many valid reasons to support the full "PWA experience" and have fallbacks that works without JavaScript, and it is attainable. I have personally built PWAs that work offline with JavaScript enabled, as well as with a network connection without JavaScript enabled.
It might be better to think of a PWA as a regular high performant "mobile first web application" that took the right vitamins. ;-) The vitamins in this case are usage of service workers and a "Web app manifest."
From my perspective, the "Offline First" + "Mobile First" approaches have produced the most progressively enhanced web applications that I've even seen.