I've not had a staging environment for a good 6 years, if not more. Thats not to say that a staging env is bad, they can be very useful, if setup properly. It

I've not had a staging environment for a good 6 years, if not more. Thats not to say that a staging env is bad, they can be very useful, if setup properly. It also might be the case that you really can't test in prod. (stuff that provides safety) I am very keen on feature flags/magic routers. They have the advantage that you can test the inputs of the system with _real_ data. But that can also be a drawback.