I think whether or not Progressive Web Applications are an appropriate solution to the problem depends on the type of mobile app. If all you’re building is a glorified website, then PWAs might be a reasonable solution. If you need access to a local database, store lots of local files, have complex cacheing mechanisms, need to run in the background, access sensors or various other “native” things I think PWAs become a suboptimal choice. Note that I have no written a PWA so some of these things might be easier to do than I imagine, but consider various built in applications, could you imagine the camera app, photo app, phone app, or web browser as a PWA?