It appears that the Ray developers have decided to fork Plasma and decouple from the Arrow codebase:
https://github.com/ray-project/ray/pull/9154 This is a disappointing development to occur without any discussion on this mailing list but given the lack of development activity on Plasma I would like to see how others in the community would like to proceed. It appears additionally that the Union-based serialization format implemented by arrow/python/serialize.h and the pyarrow/serialize.py has been dropped in favor of pickle5. If there is not value in maintaining this code then it would probably be preferable for us to remove this from the codebase. Thanks, Wes
