Is there anything else beyond realization of the five skhandas? What happens when individuality totally disappears by recognizing the five skhandas as not "me" or "mine"?

Which platform or ground remains after one has fully realized that the five skhandas are impermanent?
MN121 is a wonderful discourse on emptiness. At the end, the five skandhas are gone:


  MN121:12.1: They understand: ‘Here there is no stress due to the defilements of sensuality, desire to be reborn, or ignorance.


However, something remains:


  MN121:12.3: There is only this modicum of stress, namely that associated with the six sense fields dependent on this body and conditioned by life.’


In particular, the Buddha instructs Ananda:


  MN121:12.6: And so they regard it as empty of what is not there, but as to what remains they understand that it is present.


Perhaps the most remarkable aspect of this instruction is its universal applicability. It is true riding on a crowded train. It is true in deep meditation. Conventionally we ignore the emptiness and grasp at what remains. With practice we see that emptiness is always there. And we are simply aware of what remains, attending without grasping.