You're right! I'm also starting to think that some of their concept is contradicting just like for example Spotify as what you've said it's indeed contradicting, when I think the purpose of no installation is to save some storage in our devices.
It is not contradicting actually if we try to understand the whole concept.
You see, PWAs are apps that does not require to be installed before you can use them, since it runs on the server itself and not merely on our devices. But content-aware applications such as spotify gives us a chance to play songs offline by dowoading the music content and not the app it itslef.
I hope this helped.
Yes you're right! There's a big difference between the content and the app, because the app is the only focus of the no installation system so meaning to say the app is the only thing that won't affect your storage but when it comes to the content you've downloaded, it's completely take your storage.
Glad to know you got the point naruto.
Content downloads are really user dependent. One can choose to download them, specially for music and videos so they could play them offline, yet, the download will never be mandatory. That is why PWAs will remain a storage saving technology.