A 10x increase in compute may only yield a one-tier improvement in model performance. This appears inefficient but can be the difference between a useless "6-year-old" intelligence and a highly valuable "16-year-old" intelligence, unlocking entirely new economic applications.

The discourse often presents a binary: AI plateaus below human level or undergoes a runaway singularity. A plausible but overlooked alternative is a "superhuman plateau," where AI is vastly superior to humans but still constrained by physical limits, transforming society without becoming omnipotent.

Beyond simple productivity gains, AI will eliminate the need for entire service-based transactions, such as paying for basic legal documents or second medical opinions. This substitution of paid services with free AI output can act as a direct deflationary headwind, a counterintuitive effect to the typical AI-fueled growth narrative.

Contrary to the feeling of rapid technological change, economic data shows productivity growth has been extremely low for 50 years. AI is not just another incremental improvement; it's a potential shock to a long-stagnant system, which is crucial context for its impact.

Contrary to the consensus view of explosive AI-driven growth, AI could be a headwind for near-term GDP. While past technologies changed the structure of jobs, AI has the potential to eliminate entire categories of economic activity, which could reduce overall economic output, not just displace labor.

The massive investment in AI mirrors the HFT speed race. Both are driven by a fear of falling behind and operate on a logarithmic curve of diminishing returns, where each incremental gain requires exponentially more resources. The strategic question in both fields becomes how far to push.

The AI buildout won't be stopped by technological limits or lack of demand. The true barrier will be economics: when the marginal capital provider determines that the diminishing returns from massive investments no longer justify the cost.

Karpathy pushes back against the idea of an AI-driven economic singularity. He argues that transformative technologies like computers and the internet were absorbed into the existing GDP exponential curve without creating a visible discontinuity. AI will act similarly, fueling the existing trend of recursive self-improvement rather than breaking it.

Even if AI drives productivity, it may not fuel broad economic growth. The benefits are expected to be narrowly distributed, boosting stock values for the wealthy rather than wages for the average worker. This wealth effect has diminishing returns and won't offset weaker spending from the middle class.