Some numbers. The difference in power output at 10,000 feet between acclimated and not is about 4%. By 14000 feet it drops to 1%.
https://www.trainingpeaks.com/blog/t...tput%20quicker.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.