Writing to catalogs is still pretty new. Databricks has recently been pushing delta-kernel-rs that DuckDb has a connector set up for, and there’s support for writing via Python with the Polars package through delta-rs. For small-time developers this has been pretty helpful for me and influential in picking delta lake over iceberg.
The dependency on a catalog in Iceberg made it more complicated for simple cases than Delta, where a directory hierarchy was sufficient - if I was understanding the PyIceberg docs correctly.
