Fast startup, obviating the need for any readiness notification (the point of execution can be guaranteed to correspond to readiness), time-travel debugging, pr

Fast startup, obviating the need for any readiness notification (the point of execution can be guaranteed to correspond to readiness), time-travel debugging, process migration, rollback/rollforward of execution state, orthogonal persistence, etc. The original motivation for checkpointing, IIRC, was not to lose the state of really long (days, weeks...) computations. But it goes much further.