We ran into an issue when trying to upgrade Ballista to use DataFusion 16.0.0, so I am planning on making a patch release to resolve this.
I have created a maint-16.x branch and cherry-picked the fix for the Ballista issue. If there are other bug fixes that should be included in the patch release, please comment on the tracking issue [1]. Thanks, Andy. [1] https://github.com/apache/arrow-datafusion/issues/4948
