1. Net-new applications: If starting from scratch, PL/I on AIX is difficult to justify given withdrawal from marketing (July 9, 2025) and end of standard support (April 30, 2027).
2. Cloud-native portability requirements: If workloads must run across commodity Linux and cloud CI/CD stacks, migration to more portable platforms or languages is likely preferable.
3. Budget-constrained or small organizations: Procurement friction and enterprise licensing models can make this product unsuitable for small buyers.
4. Need for a broad third-party ecosystem: If rich open-source libraries, modern IDE integrations, and large community support are required, PL/I ecosystems generally lag.
5. Explicit certification requirements: If procurement requires product-level SOC 2 or ISO 27001 statements for the compiler itself, no public documentation for such certifications was identified.