but you won’t find any mention of the side effect of delaying notifications
Then let me be the first to say that this does sound quite positive.
Saves battery and gets us all to be a bit less app-driven in our daily lives. We could all stand to gain from getting less notifications and wanting to react less immediately to them. Maybe just the default being notifications arriving bundled once every 60 minutes or so wouldn’t be all that bad (AMBER alerts etc nonwithstanding of course but they use a different system).