Current example from work: an extreme single-tenant architecture, deployed for large N number of tenants, which need both logically and physically isolation; th

Current example from work: an extreme single-tenant architecture, deployed for large N number of tenants, which need both logically and physically isolation; the cost of the cloud provider's managed databases is considered Too Expensive to create one per tenant, so an open-source Kubernetes controller for the database is used instead. Not all systems are small-N modern multi-tenant architectures deployed at small scale.