Well, how workable are they?

Let's say a kid's lemonade stand increases its revenue from $1/month to $100/month in three months. Clearly that 100x revenue increase per quarter is sustainable, so it predicts a $100M revenue a year from now, raises money at a $1B valuation, and signs a contract to buy $10M in industrial lemon squeezing machines. The squeezer manufacturer then predicts that it'll see a $500M revenue from all the other lemonade companies, raises money, and spends $1B on expanding its factories. Meanwhile, the kid is actually losing money because they are selling gold-leaf lemonade for $1 / glass while it costs $100 / glass to produce.

But the lemonade stand is making money! Worst-case scenario they'll just renegotiate the squeezer contract and slow down their growth, right? If the lemonade business goes bust they'll just sell hundreds of millions of dollars of squeezers to lime juice stands, right? The government will declare lemonade a "resource critical for national defense" and bail out the industry, right?

Yeah, sure, AI isn't 100% bullshit. There is indeed some money there, it won't be a complete collapse. But the numbers we are seeing are absolutely insane. We're already at "AI is bigger than the entire internet" levels of investments! Either we are collectively burning hundreds of billions of dollars on pure hype, or somehow every single company on the planet is hiding a secret 10x AI-boosted productivity increase.