The system is largely idle, so there aren't any great #s on overall system performance. The key is when some background process runs, e.g. a backup, it now runs

The system is largely idle, so there aren't any great #s on overall system performance. The key is when some background process runs, e.g. a backup, it now runs at lower priority. So when you try to do other stuff during that backup, the other (more important stuff) completes faster.