Getting an application to the state where you can use feature flags for any new functionality is a massive and continuous effort. Any change in data structures

Getting an application to the state where you can use feature flags for any new functionality is a massive and continuous effort. Any change in data structures or APIs become a huge pain. Whether this is worth it, depends a lot on the particulars of your apps. And where do you test if your feature flags work correctly with production data and environment if not staging? Yes yes, you might have tested in on your development environment, but if testing on staging doesn’t work because the environments are too different, testing on localdev or CI is even worse.