Come to think of it. Are all installed mobile applications do not have these features? I think they dont because if they do i do not think Yappadappadoo will even have the idea of developing web applications if all the features they mentioned in PWA are also in installed applications. So there will be no need for us to think twice in this matter.
If they brag about this feature, meaning it is absent in native applications. What is the use then of offering this project if everything they offer can also be found in native applications. On of these is linkable, I agree with it and they dont have it there, download-free too. This one also is not in native applications.
Safety is also very important. Since they use https according to their explanation, this secures the browsing, and if you are making online transactions through web and not in application, then it means you have a more secure transactions than that of applications.