> "[Hypersonic] Maneuverable reentry vehicles have existed for quite a while"

I keep reading this comment on HN. It's like saying "What's the deal with Chuck Yaeger breaking the sound barrier, we've had supersonic bullets that do that for a long time". There is zero overlap between the two.

Maneuverable reentry vehicles can wobble around a bit while falling, whereas the point of hypersonic weapons is maneuverability for a significant part of the trajectory.