

That depends on your definition of private.
A push notification is pretty much just a ping that wakes up the app that is supposed to show you the notification. There usually isnt much data in that ping, so the only thing the Google firebase servers (or whatever other backend solution you use) see is a timestamp and an app. If you then disable Notification historie (default is off bzw on GraphenOS) there is no other data stored anywhere.
That’s metadata that every single chat service has, no matter if its E2EE or not, because that’s the bare minimum they need to transmit anything at all. If that already isn’t private for you then you’d have to stop using the internet or phonecalls entirely and go back to carrier pidgeons.

You read that a bit wrong. Productivity didn’t go down, productivity growth did.
Economists are for some reason unable to accept that their so called productivity doesn’t grow infinetly. Every prognosis pretty much depends on a constant linear growth, so with a breakthrough in technology you would expect exponential growth.
But what somehow no one of them considers is the fact that human productivity has reached its physical limit hundreds of years ago and the only thing even leading to linear growth in the first place are these technological breakthroughs.
And that’s also the current issue. We haven’t had a major breakthrough in quite a few years. Sure everything gets better and easier to make, but nothing that happened in the last 20 years comes even close to the advent of PCs or the Internet as a whole. So the only way to keep your line from going up slightly less (not down, just slightly less up) is to reduce the number of workers while keeping your supposed output the same, i.e. firing people.
Its the desperate struggle of the current system (capitalism) that depends on the lie that productivity can go up infinetly.