The curly cord has a buttload of mojo. For TO, I would never use one ... it's far too coloured, heavy, tangles, etc etc.
For 70s style stuff? There is no alternative>
LP with Riff Raff/Stormy Monday + curly cord + Thundertomate TB + Splawn in plexi gear + Scumback = awesome!
Using a more modern cable opens up the high freqs quite a bit, actually, I'd say from 8k and over. So, the curly cord can sound veiled when using it for metal. In the reverse, for my 70s styles stuff, modern cables sound overly harsh.