Russia uses its S-400 air defense missiles in a surface strike mode. Once Ukrainian ballistic missiles start raining down, this may no longer be an option.
Ukrainian developers rush new weapons into combat to gather data, not to inflict damage—the way Fire Point spent a year missing before the Flamingo started landing. The first ballistic shot was doing that job.
Chief designer Denys Shtilerman says both are priced at half what ATACMS costs and built to fire in numbers large enough that interception doesn't decide the outcome.