It’s a blend. There are plenty of changes in a production system that don’t necessarily need human review. Adding a help link. Fixing a typo. Maybe upgrades with strong CI/CD or simple ui improvements or safe experiments.

There are features you can skip safely behind feature flags or staged releases. As you push in you fine with the right tooling it can be a lot.

If you break it down often quite a bit can be deployed safely with minimal human intervention (depends naturally on the domain, but for a lot of systems).

I’m aiming to revamp the while process - I wrote a little on it here : https://jonathannen.com/building-towards-100-prs-a-day/