> Or consider a PWA music player - 50MB of music is all you can play offline.

> Or a photo editor - 50MB is the limit for all your saved files unless you want to save them to a cloud server.

Why should either of these be saving files in an app-specific private datastore? Music, photos, videos, etc. should be in the standard system locations. The app's data storage should be solely used for settings, cache, and other internal data only useful to the app.

I'm not familiar with PWAs but if they can't access system storage then I don't think they're a useful choice for a music player or photo editor.