I mostly agree, but the military distinguishes between hypersonic glide vehicles that are launched from a rocket and then glide at hypersonic speeds towards the

I mostly agree, but the military distinguishes between hypersonic glide vehicles that are launched from a rocket and then glide at hypersonic speeds towards the target while being able to do evasive maneuvers and hypersonic ballistic missiles (which all 40 year old ICBMs are). The Oreshnik was famously falsely classified as an HGV in the first weeks by alternative media. There is so much hype about "hypersonic" that I'm not sure if a true HGV even exists today. The gadget from the article looks like an attempt at it though.