Couple of things to note here:
- It is not possible anymore to delete an application that still has devices (you will get an error message)
- There is a big warning displayed currently when deleting an entity warning about the implications, including the fact that the ID cannot be reused (note that device IDs can be reused though)
- Admins are able to restore deleted entities, though it’s currently only possible via CLI
- Admins are also able to “purge” entities, meaning a hard-delete that will also release the entity IDs for reuse