Very true, it doesn't take much ice at all especially if it really is that cold. If anyone remembers the early March 2015 ice event (I think it was on the 1st, a few days before that snow we got), it was nothing heavy...light drizzle or rain, maybe some sleet as well as I recall. Temperatures were also just below freezing, not as cold as what models are indicating for this Saturday. Didn't accrue a ton of ice, but it was outright dangerous!! In broad daylight, in early March no less.
ETA: Experienced a really bad ice storm in Atlanta in Jan. 1999 (not the Super Bowl one the next year). Decent precip rates just pouring into that cold air, and it accumulated quite a bit (can't remember exact amounts, but I'd say pushing half inch of ice or so at least some places). Pine trees and those southern magnolias (which keep their leaves all year) with the huge leaves got absolutely shredded.