Upgraded cords for linear power supplies?

I've got a a Keces 12vDC linear power supply feeding my DAC and streamer, and a Swagman Labs 24vAC unit powering my Rega TT-PSU. Is there any reason to use upgraded power cords (Furutech plugs, DH Labs cable) with these? Doesn't all the magic happen in the linear power supply?

Just wondering....