I've worked at a large company where everything was under feature flags, think a dozen teams working on apps alone. We didn't push straight to develop, but we d

I've worked at a large company where everything was under feature flags, think a dozen teams working on apps alone. We didn't push straight to develop, but we definitely had possibly unfinished code on production. For example a feature could be "done" but a bug was found, and the app was already released. That feature flag would simply not be turned on until the next version where it would be fixed. We had a lot of tests for each feature flag variation, both unit and ui tests. The codebase wasn't "littered" but there definitely existed unused code under flags, either to-be-used, or to-be-deleted. We had a grafana view of experiments that were old and not yet removed to manage them. Overall we never had incidents around this, to my knowledge anyway.