It seems like there’s always a hot new library or framework promising great things. But people often forget about the pain and effort required to move from an old technology to a new one. How long will it take? If you finish, will it be worth it? And if you don’t, could it leave you in a worse place than where you started? Drawing from my experience of the Typescript migration we recently completed at Monzo I’ll take you through some of the different outcomes of technical migrations and the things we learned along the way.