I wasn't even talking about the Loveland pass video (when discussing EV towing at least, the reference above was just normal EV testing that shows you don't gain as much as you might think you will on the downhill), they had another where they try and tow a trailer to Oregon for a show and just get killed on the range and the real problem, the recharge times vs gas. They called in the Ram to finish the trip, it was still faster many hours into the run to start the whole trip over from the beginning with the Ram. The trailer used in that video was much lighter and had a smaller frontal aera but still just destroyed the range on the Model X.
https://youtu.be/yjklex38lkQ