Why follow a one-to-one rule between maintenance transports and retrofit transports?

Build one retrofit transport per synced maintenance transport (1:1, not many:1).

Many:1 obscures which maintenance transport maps to which innovation transport — harder to troubleshoot and to use auto/semiauto. 1:1 makes Retrofit reports a usable record, eases distinguishing project/maintenance transports at cutover, and gives more visibility and control.