It all comes back to Moores law. Today, there is more competition between chip fabs than ever. ARM is beating Intel in a number of markets. They are able to do

It all comes back to Moores law. Today, there is more competition between chip fabs than ever. ARM is beating Intel in a number of markets. They are able to do so, because Intel is slowing down. Intel is slowing down because of Moore's law. The idea that a company would optimize a chip to their specific purpose is also a consequence of Moore's law. If performance did exponentially increase, there would be no point in optimizing for a task, because by the time you finished that, the general purpose solution would be faster.