Well I've personally seen multiple 15+ Duramax with over a quarter million miles, and my co worker has a 3.0 eco diesel Cherokee with just over 200k! That's more than impressive for a modern stellantis product lmfao. But I do get your point, their not as reliable as they used to be for sure. I work on old diesel land rovers and there's nothing quite like a 1.9 idi rattling it's guts out to struggle moving a glorified powered wheelbarrow lol. And all these new diesel rigs anything like 02+ is basically pull the cab off the frame for any service so ur not doing much of that shit at home unless you have a skid steer or forklift or an actual lift at ur disposal. NMC do still loose range in the cold, and coupled with the energy required to heat the cabin your certainly not getting the range you'd expect on a nice mild 55-70* day. A gas or diesel produces a lot of waste heat, which used to heat the cabin does not affect range. Ice vehicles do not sacrifice any significant range to either heat or cool the cabin, but I'm sure once we have slightly more energy dense batteries that can hold more KWH / lb we will be having a whole different conversation.