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SYSE.29:3 - Forces

ForcePractical tension
Improvement and continuityA better path may change the assumptions of users who cannot move immediately.
Retirement and retained stateStopping new requests does not remove stored information, evidence or future recovery use.
CoexistenceTwo paths can lower transition risk while increasing maintenance and compatibility burden.
Complete knowledgeActual consumers may be hard to enumerate; uncertainty must be handled without inventing either zero risk or an endless support promise.