01HISTORY
Records arrive, history doesn't
Notes, emails, call logs, attachments and record ownership get silently dropped because the export only covered top-level records. Reps open the new CRM to contacts with no past, and stop trusting it on day one.
02GARBAGE
Ten years of duplicates, faithfully copied
Migrating without profiling carries every duplicate, dead lead and inconsistent picklist into the clean system. The new CRM ends up being the old CRM with new paint, at full project cost.
03AUTOMATION
Workflows don't migrate, and nobody planned for it
Assignment rules, lead scoring, sequences, approval chains: none of it exports between platforms. Discovering that mid-project turns a data move into an unbudgeted automation rebuild.
04CUTOVER
Big-bang cutover with no way back
One weekend, one import, no delta sync, no rollback plan. When something is wrong on Monday morning, the old system is already stale and there's nothing left to fall back to.