AGI is far more plausible than warp drive or wormholes. Most objections I read, dismissing the inevitably of AGI always seem to be based in the objectors limited imagination, or actual flaws in thinking that treat consciousness as magic.

Any physical system can be simulated/approximated given enough computational resources. The brain is purely physical and is the sole cause of mind.

AGI is inevitable outcome of some bulk of matter being designed to solve novel problems efficiently.

I honestly couldn't imagine a future that wouldn't contain these beings.