The article explains why they want to avoid this option: > Starting at version 14, PostgreSQL supports generated columns - these are columns that are automatic

The article explains why they want to avoid this option: > Starting at version 14, PostgreSQL supports generated columns - these are columns that are automatically populated with an expression when we insert the row. Sounds exactly like what we need but there is a caveat - the result of the expression is materialized - this means additional storage, which is what we were trying to save in the first place!