Opentofu vs pulumi, which one survives a 200-account landing zone

Short summary

Infrastructure-as-code tools designed for single teams fail structurally at 200+ AWS accounts due to state management serialization and authentication overhead. OpenTofu's shared backend creates 8-12 minute lock contention delays during peak deployments, while 200 sequential plan operations per module change stretch cycles to 4+ hours. Solutions include per-account backend isolation, provider mirrors for caching, and external orchestration tools like Terragrunt.

• •Scale threshold: 200+ AWS accounts expose architectural limits in state locking, provider initialization, and cross-account parallelism that push sequential deploys beyond 4 hours
• •OpenTofu lock contention: shared backend design serializes initialization across workers, measured at 8-12 minute queuing delays; per-account S3 bucket + DynamoDB isolation is the fix
• •Required solutions: provider mirror caching, external orchestration (Terragrunt), and infrastructure-as-code bootstrap automation before account vending

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