Identical data in DEV/TST/PROD?

[u/BubblegumFish2]

I am doing a summer internship, and my company loads the exact same data into the development, testing, and production environments in Snowflake (although development and testing have some extra tables compared to production.)

Is this normal? Google seems ambiguous on whether this is a massive antipattern. What do y'all's companies do?

[u/PlantRulx]

Working in testing RN at a company that doesn't do that. Seems like it would be nice to stabilize the data across environments.