The video is more so an introduction to the concept, I'd always recommend checking documentation and best practice based on the scenario that works for you. Check out the Microsoft documentation here: learn.microsoft.com/en-us/azure/databricks/lakehouse/medallion
so 3 lakehouses
wouldn't that be incompatible with the one lake concept? and what about data redundancy and storage cost as data is duplicated there?
The video is more so an introduction to the concept, I'd always recommend checking documentation and best practice based on the scenario that works for you. Check out the Microsoft documentation here: learn.microsoft.com/en-us/azure/databricks/lakehouse/medallion