Opinion Rant: I think I just found a reasonable reason why we are not getting Snow Depth.

The problem is that people ACTUALLY stay up all night long nit-picking over every detail!

If you locked a town in a deep-freeze winter (snowing on every day), at what point would the accumulation "cap" need to be? Your Sims' knees? Hips? Or to the rooftop of a single-storey house? Would everyone be satisfied? Probably not. This is just EA's fail-safe plan.