What Is Infrastructure as Code and Why It Matters

No. Small and mid-market teams often benefit the most because they have fewer people to absorb the pain of manual, error-prone setups. A three-person engineering team that loses its infrastructure expert is far more exposed than a large company with redundancy. IaC reduces that key-person risk regardless of company size.

A shell script runs a sequence of commands but has no built-in concept of desired state, so running it twice can create duplicates or errors. IaC tools are declarative and idempotent: they compare what exists to what you declared and make only the necessary changes. They also manage dependencies between resources and track state, which raw scripts do not.

Yes. Even serverless architectures involve functions, permissions, API gateways, databases, and event triggers that all need configuration. Defining those in code gives you the same consistency, repeatability, and auditability benefits. If anything, the number of small interconnected resources makes manual management harder, not easier.

The most common risk is mishandling state and permissions. A poorly secured state file can expose sensitive information, and an overly broad automated apply can destroy resources unexpectedly. These risks are manageable with remote state storage, access controls, and mandatory plan reviews before any change is applied.

Yes, though it takes effort. Most tools support importing existing resources into code so you do not have to rebuild from scratch. Expect this to be more work than starting fresh, since you are reverse-engineering the current state, but it is a standard part of modernizing an established environment.