I consider the decision to merge zones of multiple countries, just because they share a common post-1970 history, one of the worst decisions ever made for the TZ project. There used to be Zone Europe/Copenhagen, which represented the exact timezone history of Copenhagen, in fact of all of Denmark, since the introduction of standard time in Denmark in 1890. Now the file 'europe' says # For Denmark see Europe/Berlin. But zone Europe/Berlin is a bad representation of Denmark's timezone history. It gives false data from 1949 backward. The decision to remove zones like Europe/Copenhagen from the main zone files destroys the work of a whole generation of timezone history researchers. It is a completely unnecessary step, forced by nothing. I urge the responsible persons to revert this step.