Criminally Underrated Programing Practices

A broad overview of underused but impactful programming practices: negative/boundary testing, feature flags for safe deployments, single-responsibility function design, API-first design, idempotency for state mutations, back pressure for load management, event sourcing vs. current-state storage, blue-green schema migrations, and memory arena allocation. Each practice is illustrated with brief code comparisons showing the naive vs. robust approach.