Are there any good examples of progressive web apps? I made a web app recently that had to work offline for use as a visitor display...I looked into service wor

Are there any good examples of progressive web apps? I made a web app recently that had to work offline for use as a visitor display...I looked into service workers for this (there's a Webpack plugin that helps) but they seemed complicated plus difficult to debug. It seems like you have to be careful you don't lock your users out with a service worker bug because now a browser refresh might not do the same thing for everyone now.