Drop the notion of packaging them together and you have a winning idea. There's an optional metadata file that may or may not be present alongside the exact sam

Drop the notion of packaging them together and you have a winning idea. There's an optional metadata file that may or may not be present alongside the exact same CSV that we've always had. For systems that implement the metadata they can take advantage. We do not need a new format. There are numerous superior options if we're just going to provide a different format (parquet, avro, orc, etc).