Frankly, addiction and bad habits make it very difficult to sustain that when it’s easy to re-enable things.
I have hardly any notifications, my phone is perpetually on silent with vibrate disabled (I often miss calls and texts), and I have no “social media” apps beyond iMessage/Signal. But I still reach for it at every idle moment (most time being spent in the browser).
The one app I truly need is a keepass client. Not sure how I will overcome that without a smartphone.