ArchitectureMicroservicesMonolith
After a decade of 'microservices everywhere', 2026's consensus is more nuanced: most teams should start with a well-structured monolith and extract services only when there's a concrete reason. Here's the reasoning.
The Hidden Costs of Microservices
- Network calls replace function calls — latency, retries, and partial failures everywhere.
- Distributed transactions and eventual consistency are genuinely hard.
- Operational overhead: service discovery, tracing, deployment orchestration, more on-call.
The Modular Monolith
Build a single deployable app with strong internal module boundaries. You get simple deployment and transactions now, plus clean seams to extract services later if a module genuinely needs independent scaling.
When Microservices Earn Their Keep
- A component has wildly different scaling needs (e.g. video transcoding).
- Independent teams need to deploy independently without coordination.
- Different parts genuinely need different languages or data stores.
The Pragmatic Rule
Don't pay the distributed-systems tax until the problem demands it. Start modular-monolith; split along real bottlenecks, not architecture-diagram aesthetics.
