Answer to How might we get from Artificial General Intelligence to a Superintelligent system?
Once a system is at least as capable as top human at AI research, it would tend to become the driver of its own development and initiate a process of recursive self-improvement known as the intelligence explosion, leading to an extremely powerful system. A general framing of this process is Open Philanthropy's Process for Automating Scientific and Technological Advancement (PASTA).
There is much debate about whether there would be a notable period where the AI was partially driving its own development, with humans being gradually less and less important, or whether the transition to AI automated AI capability research would be sudden. However, the core idea that there is some threshold of capabilities beyond which a system would begin to rapidly ascend is hard to reasonably dispute, and is a significant consideration for developing alignment strategies.