Thanks to some great work by Chris Dutz, RC1 for 14.1 release is out! Please go try it out, check signatures and checksums, etc.
Binaries: https://repository.apache.org/content/repositories/orgapachemahout-1062/org/apache/mahout/apache-mahout-distribution/14.1/ Source: https://repository.apache.org/content/repositories/orgapachemahout-1062/org/apache/mahout/mahout/14.1/ Best Andrew