Migrations fail in boring ways: lost redirect maps, broken serialised data, forgotten cron jobs, DNS mistakes. Migration work here is checklist-driven and rehearsed on staging before the live cutover, with a documented rollback so a bad night does not become a bad week.
Integrations connect WordPress to the systems around it — CRMs, ERPs, email platforms, payment providers — with credentials handled properly (never in code, never in chat) and failures that log visibly instead of failing silently.