In distributed systems, failure rarely arrives all at once.
Latency creeps up.
Retries pile up.
One dependency starts timing out.
And suddenly the whole product feels unstable.
That is why observability is not just about dashboards.
Metrics tell you that something changed.
Traces show where it happened.
Logs explain why.
Separately, they help.
Together, they make a system debuggable.
https://medium.com/codetodeploy/observability-in-distributed-systems-what-really-matters-in-2026-f223067b469b
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