How does a data lakehouse typically reduce total cost of ownership compared to a traditional data warehouse?

Data lakehouses store data on commodity object storage (S3; ADLS; GCS) which costs a fraction of traditional data warehouse proprietary storage; while still enabling analytical SQL queries through open table formats. The incorrect options ("By eliminating the need for data governance and auditing processes", "By requiring data scientists to write all queries in Python instead of SQL", "By caching all data in RAM to eliminate disk I/O costs") are distractors that don't fully capture the concept described.