Man, this hits home! I ran into the same deal on a couple of RAM Cummins trucks a few years back, temp sensor was off and the computer never knew anything was wrong until the head gasket let go. What worked for me was grabbing an infrared temp gun and shooting the thermostat housing and upper hose after a good hard run, then comparing that to what the scan tool said. Takes five minutes and you catch the drift before it eats a valve or worse. If the numbers don't match within a few degrees, I just swap the sensor, they're cheap and it saves a ton of grief down the road.

The canister stoves dying thing makes sense when you think about the fuel itself, not the stove. Those little isobutane mixes lose pressure in cold and the seals dry out and crack if they sit in a hot garage all summer between trips. My old white gas Coleman just keeps going because liquid fuel doesn't care about temp and you can rebuild the pump for like 12 bucks. That's the part nobody talks about, the cheap stuff tends to be the stuff you can actually fix instead of tossing.