The Architecture of Immutability: Storage Systems and Strategic Trade-offs

Immutability evolves from a coding principle into a critical architectural decision that fundamentally shapes how systems store, process, and recover data at scale. Different database technologies—from relational systems that resist immutability to specialized event stores that enforce it—demand distinct trade-offs between implementation complexity, performance, and consistency guarantees. Navigating these choices is essential for building distributed systems that reliably combine scalability with data integrity.