Thank you for sharing those. I'm also interested in taking advantage of it. Also, I hope `spark-upgrade` can help us in line with Spark 4.0.
However, we don't need to discuss any of this if we don't build a consensus on both Spark 4.0 or next Scala version. We don't have a vehicle at all to reach there yet. In the community, I saw a bottleneck; "No in 3.x era" and "No for 4.0 yet because XXX" Dongjoon.
