>to take the missile instead of their big sister
Given its cost co$$$$t doubt the Zumwalt is as disposable as that. Though in historical terms you are precisely correct. This race upwards in capability and cost, downwards in numbers, is gonna cost Western armies dear as second tier opponents scale up to good-enough.
Hopefully we won't get to see Chinese asymmetric developments in action (ex DF-21), because that competition will diffuse itself. But if we did, I find our platinum-plated approach worrying. Not the least because the only credible opponent motivating these systems is China which spurs more arms race.
Good for defence firm revenues tho.