System design looks clean in theory.
But real systems are built on trade-offs.
1. No Design is Future-Proof
Netflix started with a monolith and later moved to microservices as scale increased.
2. Trade-offs are Unavoidable
Amazon often prefers availability over strict consistency.
Users may see "Order Placed" even if systems are still syncing.
3. Over-Engineering Slows You Down
Microservices too early can slow development.
4. Assumptions Fail
Uber had to redesign systems as demand patterns changed.
5. Cost vs Performance
Better performance requires more infrastructure cost.
6. Complexity Increases with Scale
More services lead to more failures and harder debugging.
Final Thought
There is no perfect system design. Only trade-offs.
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