Depends on the perspective. Adding one data field to a Kafka record, or Protobuf message, or Bigtable cell, or Postgres table is already an improvement. There

Depends on the perspective. Adding one data field to a Kafka record, or Protobuf message, or Bigtable cell, or Postgres table is already an improvement. There is already so much work to do consuming data from A, transforming it, and storing it into B.