And all the Arrow parts work together quite nicely. ADBC client --> Flight SQL (duckdb/whatever) --> Flight --> ? The result highlights your exact point:

And all the Arrow parts work together quite nicely. ADBC client --> Flight SQL (duckdb/whatever) --> Flight --> ? The result highlights your exact point: why take your data and transpose it twice? It's quite an exciting space, and lots of projects popping up around Arrow Flight and duckdb.