Matryoshka brain?

A matryoshka brain is a hypothetical mega structure that consists of a series of nested Dyson spheres each built around a different star of varying sizes or temperatures. The Matryoska brain acts as a solar system sized super computer with full godlike self awareness making it a kind of sub galactic super intelligence far surpassing any computer we have currently. The energy from the star/stars is sent through nearly indestructible tubes made of a substance called nanite tubelets this a hypothetical material that is approximately 1 trillion times stronger and more flexible than graphene. These tubes lead to the main reactor within the centre of brain when this happens the energy is converted into calculations or meaningful data. The matryoshka brain would allow for the simulation of entire universes or even dream worlds simulated by scanning the dreams of each and every person so that everyone's experience within the brain is different. The sphere could also act as a resting place for the trans human super minds of the  future if they wish to rest from their duties in the universe  when they wish to leave the sphere they choose a suitable body and use that body to phase through the brain. A type 4 civilization or a universal level civilization would be able to use many billions of Matryoshka brain as away to simulate many billions of universes within our universe. A type 5 civilization would transcend the concept of the Matryoska brain as they would exist outside the multiverse.