I cloned OpenMage 20.1.0-rc4 to do more test without Magento Sample Pack. After installing it from scratch when I accessed the Backend, I no longer saw the familiar message under the menu like before
Important: Formkey validation on checkout disabled. This may expose security risks. We strongly recommend to Enable Form Key Validation On Checkout in Admin / Security, to protect your own checkout process

When I checked the value, I found that it is now set to Yes by default. When did this happen? It would have been natural for the value to remain set to No precisely as a warning to modify the template in case a custom theme is used.
