SYSE.29:2 - Problem

A new path can be technically available while existing users cannot perform their work through it. Old records may remain readable only through the retired service; infrequent recovery tasks may be absent from recent usage logs. A nominal rollback can restore an old executable while leaving incompatible data behind.

Keeping every old path indefinitely is not a solution either. Unsupported dependencies, security risks and maintenance burden can make continuation unacceptable. The decision must give remaining use and obligations a truthful disposition.