The only time I have ever used at stove at high altitude was on Denali a "few" years ago. Everyone used liquid fuel stoves, not a canister in sight. -20F was a nice day at around 14,000 feet.

I am a fan of canister stoves, but in cold weather, if you absolutely, positively want a fire, go liquid.

Nice, concise write up. Jim, you should have it framed.