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SYSE.34:3 - Forces
| Force | Practical tension |
|---|
| Continuing service and simple change | Coexistence reduces coordinated interruption but adds compatibility and synchronization work. |
| New meaning and reversibility | A richer representation can improve use while making an exact return impossible. |
| Bounded migration and concurrency | Small batches control load; concurrent writes still need an explicit ordering rule. |
| Technical recovery and acceptable loss | A restore mechanism can work while its time or information loss remains unacceptable to the people relying on the service. |