I feel that when we get AGI,it will take less than a decade to reach ASI because of the implementation,regulations and failure to create new laws around it. Even the world's biggest supercomputer,right now can't be considered that it can emulate the human brain,we don't have AGI yet. When we eventually get the AGI it'll take years to create alternative models and tell it to start producing more copies. All these things take time and money,that's why most people say that ASI will take a while to reach once we have AGI. But we will be getting there soon enough.