Not saying it's not a problem, I actually don't know, but new CPU's are just old models with more improvements/tooling. Same with TV's. And cars. And clothes. Everything is. That's how improving things works. Running out of raw data doesn't mean running out of room for improvement. The data has been the same for the last 20 years, AI isn't new, things keep improving anyways.
Well from cars or CPUs its not expected for them to eventually reach AGI, they also don't eat a trillion dollar hole into us peasants pockets. Sure, improvements can be made. But on a fundamental level, agents/LLMs can not reason (even though they love to act like they can). They are parrots learning words, these parrots wont ever invent new words once the list of words is exhausted though.