Deliver an outcome whose defining difficulty is that it spans more than one platform.
A Synapse dedicated SQL pool or a set of SSIS packages is due to move to Fabric, and nobody can say what is in it, what each piece would take or what stops it.
Part of a dbt project is moving to another warehouse, and a macro its models call only compiles, or only returns correct values, on the old one.
A table or model has been rebuilt on another platform or database while the original is still running, and the owner needs evidence the two hold the same data before cutting over.
A scheduled load-and-build job has to move to another platform, and nobody has written down what it must keep doing.
A dbt project has to run on a different warehouse or lakehouse, and the dashboards and reports that read it cannot show a different number afterwards.