They are. They are all forced to use NIP-04, for instance. So, nobody can migrate to NIP-44 because we don't have approval from devs of these less used kinds. NIP-90 forces kind ranges, which blocks any DVM from being replaceable or ephemeral. Error messages are all the same, even though each DVM has their own error types. Job chaining has never been used. The `bid` system doesn't make any sense. The generic input and outputs designs can be massively simplified in each kind. They don't need to use `i` and `param`. They could just have their own tag names.