This makes a good case for visible data lineage (external system coupling), in conjunction with clear program/ETL documentation (internal data coupling), so you

This makes a good case for visible data lineage (external system coupling), in conjunction with clear program/ETL documentation (internal data coupling), so you can see the full data transformation. There are a few cross cutting concerns with a data mesh, namely authz, schema and cacheing. Most companies don't consider the data mesh at a company level which is a shame as solving all the above should be doable at a company level.