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Is the AI Boom a Bubble? Lessons from Tech History

Source: paulkrugman.substack.com

Published on October 12, 2025

Updated on October 12, 2025

Illustration of a bursting bubble with AI-related icons

Is the AI Boom a Bubble?

The meteoric rise of artificial intelligence (AI) has sparked concerns about the possibility of an AI bubble, with experts cautioning that the rapid growth and investment in the sector could lead to a burst, impacting the global economy. As AI technologies continue to advance, historical parallels to past tech booms, such as the railway mania of the 1840s and the telecommunications boom of the 1990s, offer valuable insights into the potential risks and outcomes.

The current AI boom is characterized by significant investment, both from private and public sectors, as well as heightened expectations about the transformative potential of AI technologies. However, there are growing concerns that these expectations may be inflated, leading to a scenario where financial returns fail to meet the hype. This could result in a collapse of the AI market, similar to the bursting of previous tech bubbles.

Lessons from Tech History

The railway mania of the 1840s serves as a stark reminder of the risks associated with overinvestment in transformative technologies. During this period, businesses and investors poured vast amounts of capital into railway development, driven by the promise of revolutionary change. While the technology did indeed transform society, many companies struggled to achieve profitability, leading to widespread failures and a subsequent economic recession.

Similarly, the telecommunications boom of the 1990s saw massive investments in new technologies, only to be followed by a collapse when expected returns did not materialize. These historical examples highlight the cyclical nature of tech manias, where initial enthusiasm and investment are often followed by disappointment and market corrections.

The Generative AI Shift

Recently, the conversation around AI has shifted towards the concept of "generative AI," which acknowledges that current AI technologies may not fully replicate human intelligence. This shift in terminology reflects a growing recognition of the limitations of AI, as well as the need for more realistic expectations regarding its capabilities and potential.

Despite these limitations, the AI sector continues to attract significant investment, with many believing that AI will drive future economic growth. However, the question remains: what happens if the AI bubble bursts? The impact could be substantial, potentially triggering an economic downturn and affecting industries that have become reliant on AI technologies.

The Winner-Takes-All Dynamic

Technology bubbles often exhibit a "winner-takes-all" dynamic, where a few companies capture the majority of the market value, while others struggle to survive. This dynamic is already evident in the AI sector, with major players like Google, Microsoft, and Amazon dominating the market. Smaller companies and startups may find it increasingly difficult to compete, leading to further consolidation in the industry.

Preparing for the Bust Scenario

In the event of an AI bust, the economic impact could be severe. History has shown that transformative technologies do not guarantee financial success, and prudence is key as the AI story continues to unfold. As the AI landscape evolves, it is essential for investors, policymakers, and industry stakeholders to remain vigilant, balancing the potential benefits of AI with a clear-eyed understanding of the associated risks.

By learning from the lessons of past tech booms and maintaining realistic expectations, it may be possible to navigate the challenges of the AI bubble and ensure a more sustainable future for the technology.