Unless you're planning on running tires wider than 28mm, caliper setup every day.
Modern road calipers stop just fine, and 1.5lbs is a lot of weight.
If you're going to use the bike on dirt/gravel roads, or are doing loaded touring and want wider than 28mm tires, then discs become a viable option.
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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.