I don't think the big players want to test each other capabilities in this area.
A good point. You start touching off IRBMs and other countries are going to get real twitchy fingers. China has no illusions of our capability in this area. Its a no winner for everyone, especially them. Another thing about any kind of super sonic missile, they leave IR signatures that are huge. Which is part of the reason we never deployed a sea skimmer one yet. Those sneaky subsonics are very difficult to detect which is why were developing a variant of LRASM based on the JASMM-ER. Its sneaky, and stealthy, and smart, and might have a range approaching 1,000 miles. Like the Tomahawk ASM.
And a single B1 Bomber can carry 2 dozen LRASMs. Fire and forget, the missiles themselves will decide what and how they will attack, talking to each other thru data link. And once they do they go silent and use passive sensors when they go terminal.