The jist of the article is getting a PWA into the app stores is harder than it needs to be, especially on iOS. Between Google, Apple, and Microsoft, I found Google's Play Store to be the simplest and quickest store to get a PWA published in.
Another interesting bit is that web technologies haven't caught up to native. My PWA isn't super complex -- it's a glorified music player -- and yet integrating into the OS (now playing song on the lock screen, for example) was painful and non-standard, particularly on iOS.
All that said, I'm quite excited about PWAs. I think they will win in the long run, and will eventually (~5 years) become the dominant type of app in mobile and desktop app stores.