As specified in several parts, the tests were conducted while maintaining and using BSD-based infrastructures for over 20 years. In some cases, Linux was used for various reasons (commercial, ideological, because they were inherited infrastructures managed by others, etc.), but the results were anticipated. I did not expect a performance degradation, and in any case, having set up the systems in a mirrored environment, there was always the possibility to revert in a few minutes.