Will 2020 be the year when WebKit, and the Safari browsers by extension, will have full and proper support for Service Workers and PWAs on par with other browsers? I recall reading that Safari lags behind on it, and the allegation was that Apple prefers native apps and doesn’t want web apps to be more popular.
Hopefully not. I'd hate to click through "This site wants to push new ads to you. Allow notifications?" modals on my shiny new iPhone (edit: in addition to content being constrained to poststamp-sized areas between GDPR banners).
The need for notifications is real and Apple’s choice to exclude their availability in iOS is a business move not a technical move or a users-first move. Making PWAs better on iOS runs counter to Apple’s walled garden business model.