This isn't an economic issue, it's an efficiency issue.
There are 3 competing ideas: Fast, cheap, quick. You get to pick 2. We're picking cheap and quick because "fast" comes for free on a longer-term timeline. You can argue with whether or not this is the right choice, but this is the choice society is making, and IMO it would work better than taking significantly more time to build something that is only 10% faster. It's more efficient to let hardware manufacturers solve the fast problem when the differences are on the order of 5-10% a year but the time-to-release problem is on the order of 50-100% differences in development times.
There are 3 competing ideas: Fast, cheap, quick. You get to pick 2. We're picking cheap and quick because "fast" comes for free on a longer-term timeline. You can argue with whether or not this is the right choice, but this is the choice society is making, and IMO it would work better than taking significantly more time to build something that is only 10% faster. It's more efficient to let hardware manufacturers solve the fast problem when the differences are on the order of 5-10% a year but the time-to-release problem is on the order of 50-100% differences in development times.