> In contrast, there is no way for a PWA (unless something has changed since I last looked, in which case PLEASE* tell me) to schedule a notification for the future without contacting a server. It's a bad direction to go for PWAs, given that the whole point is for them to be able to work offline.
Looks like this effort died because of Android: https://bugs.chromium.org/p/chromium/issues/detail?id=891339