Unless you are disabled, i can't think of a reason to go auto.
Certainly in the present snow, i would be less than happy with auto.
Having said that the better quality auto cars do employ engine braking so things have improved.
Costs are the main reason for not going the auto route.
1/ higher purchase cost, 1k plus?
2/ higher VED group, less friendly to the planet, if you're into that clap trap.
3/ higher fuel consumption, as above, also less friendly to the wallet.
4/ higher repair costs, auto boxes are still very expensive, and a specialize repair job.
5/often the auto version has a lower nose weight limit, a 4x4 with a nose limit of 80kg is a joke, on you that is.
6/ often a auto has a lower towing limit, not what a caravaner requires?
7/ i find CC just about unusable in the high traffic density i drive in, OK in Europe perhaps, so i never use it.
8/ read the road tests, comments like " the auto box kept changing for no apparent reason", "hunting on hills", you get the idea, not all autos are "good" autos.