Published March 20, 2026 · 9 min read · SparkSolutions Research
Integration debt accumulates quietly: each point-to-point connection is individually reasonable, and collectively paralyzing. When a core system upgrade requires coordinating a dozen consumers, the estate has become the constraint on business change.
Event-driven architecture inverts the dependency. Producers publish facts about business events; consumers subscribe to what they need. Contracts — schemas with explicit versioning and compatibility rules — replace implicit coupling. Observability over the event flow provides the end-to-end transaction visibility that point-to-point estates never achieve.
The transition need not be total. Even a partial event backbone around the most-connected systems materially reduces coordination cost and unlocks incremental modernization.