Is it likely the Meltano SDK will ever support Apache Arrow/ADBC as a transport layer?

for singer messages? over stdout probably not, but for batch there's no reason it couldn't!

Hi Dominic! It's not a priority at the moment, but it's something I'm definitely interested in supporting. Like Derek mentioned, one option is to have it as a supported encoding in BATCH messages, but I'd definitely lean on people with more expertise or specific needs around Arrow/ADBC support to help design what that support would look like.