I recall reading about the rules for being buried at Arlington, vs being cremated and interred. I was kind of surprised at how restrictive it was. But when you read about the number of combat vets that will be passing in the next twenty years that land is going to be sucked up pretty quickly.
I don’t have an answer, but this is going to be a bigger issue over the next few years.
My Will says my ashes are to be scattered over Arlington Cemetery by a friend who loves drones. ;)