No, the difference is that when those subprime mortgages were bundled as assets, they were intentionally classed as AAA debt when they were worth much less. This created value out of thin air and allowed a shell game to be played by Bear Sterns and Lehman Brothers with the big banks. The AI stuff is paid for in cash. It's real money. It is still an incestuous investment and contracting game between the 7 major players. But that money came from the sale of stocks that are worth what they are due to market valuations and real trade (which is still bullshit).

When the public and investors come to realize AI was oversold and its abilities were exaggerated and AGI is still a decade+ away, the valuations won't just vanish. The circular investing game will absolutely cause stock devaluations and they will be sudden. That $560 MS stock will poof go back to $420 when they first invested in OpenAI. That will really fucking hurt the average 401k. OpenAI will probably go bankrupt. Meta will still be fucking worthless as a societal drain but paradoxically worth nearly a trillion dollars. Over 10% of the GDP of the entire US in capital will absolutely be destroyed. But it won't take place in a moment. Investors will be stubborn and bet on the dead cat bounce and hope and pray for their gambling addiction to pay off and keep those companies on life support.