Error budgets represent tolerance for failure — the calculated gap between perfect availability and what service level objectives permit. SRE teams treat this space as room for innovation, experimentation, and acceptable degradation. Adversaries treat it as cover.
The fundamental problem: observability infrastructure built to catch cascading failures and performance regressions wasn’t designed to detect intentional exploitation. Attackers understand this asymmetry and exploit it methodically. When reliability metrics focus narrowly on uptime percentages and latency thresholds, malicious activity that stays beneath those thresholds becomes invisible.