Daniel-Constantin Mierla writes:
Public sems was abandoned years ago.
Maybe abandoned by initial developers, also not getting many new features. Otherwise, I noticed Juha Heinanen is more or less maintaining the public version of SEMS. Maybe he can comment on its current state.
If Henning means https://github.com/sems-server/sems by "public sems", then he does not know what he writes about. It is maintained in the sense that new contributions and bug fixes will get merged to master branch.
-- Juha