Rollbacks of an integrated financial system, live and mid-collapse, built with a shockingly complex set of integrations and features on top of a series of underprovisioned distributed databases and queues, probably aren't as simple as the author believes.
Yes, they should have planned to be able to roll back, but it wouldn't have been simple. It would have been very difficult, and if they were fastidious enough to plan for a rollback they presumably would have done the development and migration in stages and performed parallel testing on the old and new systems, which would have removed the need for the rollback in the first place.
Yes, they should have planned to be able to roll back, but it wouldn't have been simple. It would have been very difficult, and if they were fastidious enough to plan for a rollback they presumably would have done the development and migration in stages and performed parallel testing on the old and new systems, which would have removed the need for the rollback in the first place.