Are you talking specifically about add-to-home-screen / offline capabilities? Because PWA is a very broad term, and most descriptions I've seen consider those features necessary to be a PWA.
Ignoring those two, you get damn near every major web app. All of Google's applications, Facebook, Twitter, etc. etc.
Ignoring those two, you get damn near every major web app. All of Google's applications, Facebook, Twitter, etc. etc.