I understand then that the big difference is that STATEFULSETS applies a ‘Stateful’ handling and that each ‘POD’ will handle its own ‘Volume’ (different data for each one). Likewise, I understand that since they do not manage a storage persist their information is deleted, it would be lost along with the Pod (STATEFULSETS could use Persisten Volume?).
In this case when the instances are duplicated, there will always be a Master Instance, which would be the only one where it could be Read & Write, the other instances would be Slaves, and only Read would be allowed. Likewise, if a New Instance is to be created, it would be of the Slave type and this would Clone one of the previous Slave instances.
I am right ?.