I did the same thing. Still have Messenger, but without push notifications.

It works beautifully. The immediate FOMO fades quickly.

Nothing of value is lost. Real friends and important info finds a way to get through.

This is my Facebook experience.

I didn't unfollow everyone like the grandparent, but I have no desire to go to the main sight. I, however, use messenger constantly (via messenger.com) because it's a unified service that all my friends are on. I've been pretty satisfied with it, but Facebook keeps adding more and more features that I have no interest in and clutter the UI.

Just Messenger, Events when I'm invited to them, occasionally being tagged in a post, and a couple of groups.