Total "stuff" of 28.5 kg, I assume that is without bike? Thus the loaded bike is 48.5 kg?

Your Nomad at 20 kg is pretty close to mine too. I think mine is about 20.6 with racks but excluding panniers, handlebar bag and water.

I decided that I did not want to know what the bike weighed in the photo, thus did not measure it. But I probably had 40 to 45 kg on it, not counting 3 kg of water or 20.6 kg weight of bike. Photo is from my Iceland trip. At the time I took the photo, I probably had almost two weeks of food on the bike.

I weigh about 80 kg plus or minus 2 kg, plus a few more kg for clothes, helmet, bike shoes, etc., that I wore on the bike.

Before that trip, I complained about the Nomad weight, but the bike handled the trip so well that now I no longer complain about it. I say it is heavy, but I do not say it is too heavy.