01SILENCE
The sync died Friday night. You found out Monday.
Integrations, scheduled jobs and webhook queues don't crash loudly, they just stop. Two days later orders are missing, invoices are stale, and the cleanup costs more than a year of monitoring would have.
02VAGUE
"Best effort" support with no numbers attached
Your current vendor answers when they answer. No severity tiers, no response targets, no escalation path, so a revenue-down outage sits in the same queue as a font change request.
03ORPHANED
Systems the original builder walked away from
The contractor who built your integration layer moved on, and now nobody will touch it. Every workflow it runs is a liability with no owner, no runbook and no one on call.
04REPEAT
Same incident, every quarter, no prevention
Firefighting without post-incident reviews means the API quota blows out again, the same job wedges again, and every recurrence is treated as a surprise instead of a known defect with a fix.