That's only assuming there are no fundamental limits or major barriers to computation. Back a hundred years ago at the dawn of flight, one could have said a ver

That's only assuming there are no fundamental limits or major barriers to computation. Back a hundred years ago at the dawn of flight, one could have said a very similar thing about aircraft performance. And for a time in the 1950s, it looked like aircraft speed was growing exponentially over time. But there haven't been any new airspeed records (at least, officially recorded) since 1986, because it turns out going Mach 3+ is fairly dangerous and approaching some rather severe materials and propulsion limitations, making it not at all economical. I would also not be surprised if the process of developing something comparable to human intelligence, assuming the extreme computation, energy, and materials issues of packing that much computation and energy into a single system could be overcome, the AI also develops something comparable to human desire and/or mental health issues. There is a not-zero chance we could end up with AI that doesn't want to do what we ask it to do or doesn't work all the time because it wants to do other things. You can't just assume exponential growth is a forgone conclusion.