I read a reply on Twitter explaining why it was used on Signal (and I can't update my own statement anymore). So basically these push notifications are used bec

I read a reply on Twitter explaining why it was used on Signal (and I can't update my own statement anymore). So basically these push notifications are used because they always work and they work for everything. If you would use the custom notification handler you are required to show a notification, which is fine for a new message but doesn't make sense for read confirmations, "is writing" updates or all other types of information that should not pop up to the user immediately. Of course you can work around it by using a WebSocket while the app is open and only use push notifications for new messages but obviously that's going to be less tight than the current situation.