Other than install method, are there any significant differences in developer experience or capability between PWA's and old school webview apps?
In many cases this doesn't really matter, but could very easily be a complete dealbreaker for someone trying to decide what to build.
React Native remains a hard sell for me. The idea behind it is that knowledge of React is where the learning curve is. Which is a flawed premise. React, itself, is dead simple. But ditching years of CSS and DOM knowledge and learning the React Native component API and quirks regarding iOS and Android? That's a massive hill to climb. Even with JavaScript by your side. I'd rather try Cordova+React if I had to. And if I truly wanted native performance, then it's Obj-C for me. Might as well suck it up and do it right in the first place.