OCI images and open table formats are necessary portability mechanisms but do not preserve identity, policy, network, catalog, workflow and operational semantics by themselves.

OCI specifies artifact construction and distribution rather than complete platform state.

Iceberg documents version and path compatibility concerns.

The Data Act separately requires interfaces, metadata, assistance and continuity.

Standardized packaging substantially lowers migration cost.

A deliberately constrained application can achieve high portability with these standards.