Ted Vilutis makes an announcement:
Schema lakehouses are now Generally Available. By using schemas in lakehouses, users can arrange their tables more efficiently and make it easier to find data. When creating new lakehouses, schema-enabled lakehouses will now be the default choice. However, users still have the option to create lakehouses without a schema if they prefer.
Read on to see how they work, as well as a bug(?) around pinned lakehouses.