Hypersonic technology has existed at least since the first space satellite reentered earth’s atmosphere. It’s interest and applications has ebbed and flowed over the decades. However, with modern analytical and manufacturing techniques like 3D printing, prototypes can be made F.A.S.T., attritable, and mass efficient. VOSB’s like Velontra are an important part of this aerospace progress.
https://thediplomat.com/2021/01/are-hypersonic-weapons-all-hype/