<ul><li>Using UUIDs can have downsides such as performance degradation, index bloat, and maintenance challenges.</li><li>UUIDs are suitable for distributed systems where unique IDs need to be generated locally to avoid collisions.</li><li>Generating UUIDs upfront can be beneficial for scenarios like mobile apps requiring immediate identifiers.</li><li>UUIDs provide security benefits by being hard to guess, making them ideal for public APIs or magic links.</li><li>They also hide insertion order, preventing users from determining database size or insertion frequency.</li><li>Common pitfalls of UUIDs include larger index sizes, fragmentation, and decreased insertion and read performance.</li><li>Sequential IDs like BIGINT may offer better performance and smaller indexes in certain situations.</li><li>A hybrid approach combining sequential IDs internally and UUIDs externally can balance efficiency and security.</li><li>UUIDs do not automatically ensure optimal sharding and require a thoughtful strategy for data distribution.</li><li>Ultimately, choosing between UUIDs and sequential IDs should be based on specific system requirements to maintain database efficiency.</li></ul>

UUID Makes Everything Better… Doesn’t It?

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