Web Push It Real Good - Matthias Ott: https://matthiasott.com/notes/web-push-it-real-good
Yet more excitement over this... I stated my stance yesterday in response to WebKit's blogpost!
What do I think of push notifications in general? They can be helpful or harmful to "digital wellbeing". But the incentives are towards them being harmful.
Use them to assure people they don't have to check your app again, don't use them to snatch people's valuable attention! elementary's very tasteful here!