In a data warehouse you store structured & organized data. In a data lake you can additionally store unstructured data. And was is now a data lakehouse?
Think of a combination of the strengths of both previous data platforms.
https://towardsdatascience.com/sql-and-data-modelling-in-action-a-deep-dive-into-data-lakehouses-fcbab9a4b9c2
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