Hi @sjmartin
Thank you for your question.
So yes, the Parallel Chunk Start/End are still part of the Labs extension. In general, I do recommend caution when using Labs nodes in production. However, the virtual nodes are widely used by many of our customers and the KNIME community. We still keep them in labs, as we want to make more improvements to the nodes. I currently do not have a timeline for publishing them out of labs, but will bring this up with our development team to prioritize this higher.
Cheers,
Ana