Answer
In practical deployments, the Linux or AIX side of the box tends to host exactly the kind of services that support an IBM i modernization plan without needing to touch IBM i licensing at all: an API gateway or integration middleware layer, a monitoring and alerting stack watching IBM i job queues and system health, a lightweight web front end, or tooling that stages data extracted from Db2 for i for reporting or AI-assisted analysis. VIOS virtualization is what makes this resource sharing possible, presenting virtualized processor, memory, and I/O resources to each partition while keeping them logically isolated from one another.
Buyers planning this kind of mixed-workload configuration should account for a few things up front: Linux or AIX partitions require their own operating system entitlements separate from IBM i, network and storage isolation between partitions should be documented as part of the security design, and capacity planning should treat the non-IBM i partitions as real production workloads rather than an afterthought, since resource contention across partitions on a single physical server can affect performance on both sides if it is not planned deliberately.