And I cannot image they generate anywhere near as much value outside of narrow market segments like replacing American junior devs and sycophant yes-men for the C-suite. I seriously cannot see even European companies paying >10%+/month per seat for each developer.

AI offers unreliable answers at high cost --- a computing revolution ???

I can't see costs going anywhere but up in the near future. The companies involved are still floating in venture capital and a significant return on all this money will have to be provided.