NEXMark is an unpublished research paper that introduced a benchmarking suite for streaming systems. The Apache Beam community implemented (and enhanced) the examples of this paper as a series of benchmarks on top of Beam that can be run on different open source distributed processing engines e.g. Apache Spark, Apache Flink, etc. This talk discusses this experience and expects to engage new contributors to bring more ideas so we can eventually have a unified and semantically rich benchmarking standard for batch and streaming data-intensive systems a la TPC.