I think if I had a DAC with an integral passive volume control with a remote and low-impedance balanced outputs, I'd might be happy without a preamp.
But all the DACs I've owned have not had a volume control (other than digital scaling pre-DAC), have not had a remote to control volume, and have had an output impedance higher than I'd want to drive long interconnects with.
But all the DACs I've owned have not had a volume control (other than digital scaling pre-DAC), have not had a remote to control volume, and have had an output impedance higher than I'd want to drive long interconnects with.