Hello Under the radar, we are actively continiously cleaning Pharo deep core so that we can work on new features. For metacello, in Pharo 13 we introduced a strict mode (so that we can detect hidden dependencies), and other loading features to support module experimentations. It will make Pharo code more robust in the long term. Since a couple of months we are actively simplifying/cleaning Metacello (as the version available in Pharo) because we want to introduce new features such as the possibility to force the reload of baselines and others. Now the unit test coverage of metacello is quite low and we do not use/know all the features that are available and that you may rely on. So we would love to have beta testers that can just try to load their code in Pharo 14 alpha and report potential bugs or features drop we would have introduced. So do not hesitate and this is a nice way to help pharo S.