The physical limits mainly apply to irreversible computation. But it seems like powerful reversible computation is attainable. Once we get well-optimized reversible computation, I will not make any bets against AGI. But building reversible computing technologies will probably be exceedingly difficult since we have to deal with things like a computational complexity overhead with reversible computation. This means that we probably have some time left before an AI apocalypse to try to get a good solution to the AI alignment problem or to just have fun.
The physical limits mainly apply to irreversible computation. But it seems like powerful reversible computation is attainable. Once we get well-optimized reversible computation, I will not make any bets against AGI. But building reversible computing technologies will probably be exceedingly difficult since we have to deal with things like a computational complexity overhead with reversible computation. This means that we probably have some time left before an AI apocalypse to try to get a good solution to the AI alignment problem or to just have fun.