After he learned about this man, he could only admire him with all of his heart. At this moment, he didn't notice but this man had already become his goal. He wanted to just be like that man. When he checked about Matrioshka Brain, he found there wasn't much to learn something new.
It was the biggest brain of the universe that has the capacity to build the digital world out of computer codes, so advanced that it would be many times better than most virtual realities. Of course, there were other things that he learned about it.
Since Matrioshka brain could create a digital world that was its limit. After all, in world rules by power, just a digital world won't be able to save humanity. The only way to save humanity would be improving Matrioshka Brain and creating a virtual world that would be no different than cultivation.