This is where the derivative of the facade pattern comes from: The smother pattern. Where you write a facade, then replace calls iteratively with the rewrite

This is where the derivative of the facade pattern comes from: The smother pattern. Where you write a facade, then replace calls iteratively with the rewrite until you’ve removed all the calls to the old API. Then you turn it off. Sometimes rewrites are genuinely a good idea, eg, you’ve lifted-and-shifted a service but would like to better integrate with cloud services.