According to a Pentagon source, the balloon offers "limited additive value" over satellites.
More interesting excerpts:
>The incident, which occurred in the last two days, marked the latest aggressive Chinese intelligence gathering maneuvers in recent years. U.S. defense officials said the balloon loitered over the U.S. longer than in previous similar incidents, which made this “different.”
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> Mr. Biden was presented with options and proposed that the high-altitude balloon be shot down after it was spotted and reported by civilians in a commercial airliner, U.S. officials said. The Pentagon feared civilian casualties, and opted not to shoot down the balloon, U.S. officials said.
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> The balloon “was traveling at an altitude well above the commercial air traffic and does not present a military or physical threat to people on the ground,” Gen. Ryder added.
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> The balloon was observed flying over Montana after flying over Canada and the Aleutian Islands, one U.S. official said. It was large enough for its debris to cause damage, and while the U.S. considered shooting it down over a sparsely populated area of Montana, the U.S. opted to not shoot it down. It also flew over sensitive sites, a senior defense official told reporters Thursday.