Standard chaos engineering assumes experiments stop cleanly, blast radius is knowable in advance, and production is fair game. Payment systems violate all three. Salim Adedeji describes ECS-specific failure modes from enterprise deployments: a 60-second DNS TTL that produced 93-second failover, retry logic amplifying database load 2.4x, and AZ rebalancing loops that generic tooling misses.

Microsoft has enabled zone redundancy on the Standard v2 tier of Azure API Management, following its arrival on Premium v2 in December. Standard v2 starts at $700 per month against $2,801 for Premium v2, but carries a 99.95% SLA rather than 99.99%. Zone redundancy can only be configured when creating an instance.