Because of Android's new SafetyNet system, certain apps can now block rooted users or prevent you from accessing them altogether — but at least for now, there are still ways around these restrictions.
It just keeps getting harder to enjoy all of the benefits of root without sacrificing features. Thanks to SafetyNet, we've lost the ability to use Android Pay, Pokémon GO, and even Snapchat to an extent. But the most recent news on this front is perhaps worst of all: Netflix has already stopped showing up on the Play Store for rooted users, and soon, it may refuse to run even if you've sideloaded the app.
When Google added new security measures to Android Marshmallow, it had a lasting impact on the entire process of rooting. These measures prevent the the Superuser daemon (the process that handles requests for root access) from getting the permissions it needs to do its job at boot. In order to get around these issues, Chainfire created the systemless root method.