In your view, understanding, Parinibbana is:

[Mahabrahma]

As long as it's Buddhist, it's reality.

[cappuccino]

As long as it's Buddhist, it's reality.

Maybe, maybe not.

[Mahabrahma]

As long as it's Buddhist, it's reality.

Maybe, maybe not.

You know the truth, however, it is fully in you, and that is what shall set you free.

[cappuccino]

truth shall set you free.

[greenjuice]

As far as understand it, some Vajrayana (and even some Mahayana) traditions interpret nibbana as liberating the mind from being trapped by suffering and negative emotions (anger, greed, etc) by getting it trained in what is basically vipassana way of experiencing things (in a detached way). This is connected with the view that there is no difference between samsara and nibbana, ie nibbana is not something outside samsara, but something which is to be experience inside it. So, one can go on getting reborn (in human and above spheres) and be in a nibbanic state of mind. IDK if there are any Theravada traditions which interpret nibbana in that way..

[dhammacoustic]

(...) ie nibbana is not something outside samsara, but something which is to be experience inside it.

samsara surpassing nibbana is the sassatavadin view, which was rejected by the buddha.

So, one can go on getting reborn (in human and above spheres) and be in a nibbanic state of mind.

makes no sense according to how the buddha describes nibbana.

metta