Nightmare is bit of an overreaction. It's just a single command at the end signifying "Ok, done for now". It's not forced on users, the system works just fine i

Nightmare is bit of an overreaction. It's just a single command at the end signifying "Ok, done for now". It's not forced on users, the system works just fine if you don't do this. It just works better if you do let the system know when is a good time to perform maintenance tasks and collect statistics.