Since I will spend at least 25% of my time in the comfortable sized tent sleeping, I maximize that time by using a cot. I do not need to lay on small rocks, roots,or other items which can cause discomfort. In the event that pads are not good, or I must set up a tent in brush or other non-ideal places, My cot takes the pressure of trying to find the ideal in an imperfect location. For me, few, little distance portages, mean that I do not care whether or not I double,triple, or take even more trips across any given portage. Why not sleep up off the ground, especially when cool. No heat loss to the ground=more comfort. To keep from sliding around on my Therma-Rest, I use bungee cords around the feet area to secure the Therma-Rest full size air mattress to the cot.
the greatest come backs are reserved for those with the greatest deficits.
Actually you can still lose heat thru the cot. As your sleeping bag is compressed by lying on it and so you lose some insulation value there so you need to have a good pad with good R value to it if it is cold out.
"Rivers know this: there is no hurry. We shall get there someday.” ~A.A. Milne