Here is their published rational: https://fedoraproject.org/wiki/Changes/yescrypt_as_default_hashing_method_for_shadow https://fedoraproject.org/wiki/Changes/ye

Here is their published rational: https://fedoraproject.org/wiki/Changes/yescrypt_as_default_hashing_method_for_shadow https://fedoraproject.org/wiki/Changes/yescrypt_as_default_h... It's not that shocking-- there is a lot less need for standardization of password hashing than protocols, and there were a lot of legitimate disagreements and ambiguous tradeoffs in the contest. (e.g. about things like timing sidechannels, the relevance of memory hierarchy, or support for other features like precomputed tables).