Great approach imo. Once you get flipped over to the new source of truth you have to make sure the business prioritizes decommissioning the old DB, though. I'

Great approach imo. Once you get flipped over to the new source of truth you have to make sure the business prioritizes decommissioning the old DB, though. I've seen certain departments (looking at you, BI) treat the old database as a permanent backwards compatibility layer.