Quite right, the argument seemed coherent to me until I observed the new performance of recent GPUs; it seems that the limits no longer exist.

I think it's legitimate to ask the question: My hypothesis is that the industry is trying to restrict the computing power of consumer machines(for military defence interests?), but the very large market for video games and 3D for video games, on the contrary, is constantly demanding more computing power, and machine manufacturers are obliged to keep up with this demand.

What confuses me, I think, is that I read a serious technical article 15 years ago that talked about a 70 Ghz CPU core prototype.