Plan to Upgrade All Environments from Non-Hybrid Essbase Version to Hybrid Essbase Version

In the February release notes I saw in the "IMPORTANT Actions and Considerations" section that Oracle is planning to Upgrade All Environments from Non-Hybrid Essbase Version to Hybrid Essbase Version.

What isn't clear to me is if clients that are still on the old PBCS sku will be able to enable Hybrid.. the notes mention : "Within the next 3 months, Oracle is planning to upgrade all environments on a non-hybrid Essbase version to a hybrid Essbase version. To ensure that your application is compatible with hybrid Essbase version, we've implemented a new utility which verifies your member formulas and provides a report so you can fix any issues..