What breaks when you migrate a CRM?

Automations, workflows, and platform-specific reporting. All of it gets rebuilt rather than moved.

That is usually the point rather than a defect. Those automations were built for the process you are replacing, so carrying them across would just reinstall the old problem in the new system.

The other thing that breaks quietly is deal ownership. Every platform stores it differently, so if nobody maps it deliberately, you end up with a pipeline where nothing has an owner. That is the single most common way migrations lose value.

Pipelines themselves always get rebuilt by hand. An imported deal has to land somewhere, and that somewhere has to exist before the import runs.