Henrik Joreteg (https://twitter.com/HenrikJoreteg) makes some pretty good arguments for PWAs. I've not had the chance to work on one, but when you start looking at mobile devices in particular, they do seem to be a good middle ground between the slimness of a document (web page) and the capability of a native mobile app. They're also not mutually exclusive with "no javascript" (if you do it right, which is a consideration). And they have the potential to save developers work, since you can get away with a PWA instead of native apps on 2+ platforms.