The current implementation of the Rules feature will be phased out. This starts by introducing the toggle in File > Settings Advanced settings. For now, all new apps and old apps without rules will have this set to off by default. All apps with existing rules will have this toggle set to on by default. The apps with Rules will still continue to work, all previously authored rules will still work. You will be able to turn Rules on again for apps that don’t have them, however this is discouraged at this time.