The original title is about scaling approaches - horizontal vs vertical. It's a technical article comparing the two scaling paths.

Short summary

Vertical scaling (bigger servers) suits monolithic or state-heavy workloads; horizontal scaling (more servers) excels at stateless web apps and request-driven traffic spikes. Most web APIs are embarrassingly parallel, making horizontal scaling the natural first choice—vertical scaling handles edge cases like single-threaded services or unsupported database sharding. Practical example: migrate from single t3.xlarge to three ECS containers behind an ALB with no code changes, just connection pooling adjustments.

• •Vertical scaling for stateful/monolithic workloads; horizontal for stateless request-driven traffic
• •Most web APIs are embarrassingly parallel—horizontal scaling is the default strategy
• •Practical migration: same code, multiple container instances behind a load balancer

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