the only valid use case is when your data is so unstructured so that you don't care what the fields in it are and you treat it like a black box. So maybe some

the only valid use case is when your data is so unstructured so that you don't care what the fields in it are and you treat it like a black box. So maybe some kind of user-generated markup that you just shift in and out. those kinds of applications are not usually kinds of problems we have to solve.