SC - Safe in the wet? Does it need traction control

I'm looking at a second hand Elise, as a more all weather car next to my Caterham (lovely in the dry but with a LSD - dangerous in the wet).

Heart set on the high revving SC, but the one I've found doesn't have Traction Control.
I'm guessing with an open differential, this is not a safety issue as if I gas it too much in the wet, the inside wheel will just spin it off.

Then I hear people with Last Editions being told to never turn ESP off. Makes me wonder if I'm making a silly mistake, and getting the wrong model.

Any experience / thoughts welcome?