Not disagreeing you, just adding a point...I self-host Conduit and use FluffyChat on my phone, with ntfy for push notifications. While that works great most of the time, I occasionally have to restrict ntfy because it'll get into some state where it destroys my battery... And push notifications obviously don't work at all in that state.

It's very unfortunate there isn't a privacy-friendly push notification mechanism built into Android that doesn't ruin battery life. Or iOS for that matter; that might actually be a feature that would get me to switch.