That's crazy, why would it have the approach of "select all columns" when you might never need all of them? Could you create a view for it to select from instead?
Either way if someone told me a ETL supports only literally all the columns or nothing then I'd assume it was a MVP product to demonstrate the idea... not a production system.
It’s strange to advertise a framework that doesn’t support more than “select *”. A framework should make easy things easy and complicated things possible. Ideally there is a natural way to do stuff, so different people understand each other’s approach.
The whole article sounds like you target total amateurs in the ETL domain.
Every decent ETL engineer knows all of that what is revealed after “a few months”.
That said, I always welcome new competition in the field. Tools still suck.
Either way if someone told me a ETL supports only literally all the columns or nothing then I'd assume it was a MVP product to demonstrate the idea... not a production system.