IT Architects Alliance

Oct 4, 2026 · Cloud Native

Should You Migrate All Internal PaaS to Kubernetes? A Decision Framework with Coexistence Cost Analysis

This article presents a decision matrix for migrating existing PaaS platforms to Kubernetes, emphasizing that unifying the developer experience layer is mandatory while unifying the orchestration base is optional. It provides a four-prerequisite checklist, three migration strategies with trade-offs, a coexistence-period cost model showing operational overhead often exceeds refactoring costs, and a four-phase transition roadmap with exit criteria.