Sure, some people heard about it in 2006. Not many, and even the people sounding alarms were called cranks up until the day after Lehman collapsed. However, right now a lot of social media is full of people basing the bubble's "any second now!" metrics on emotional AI-hate arguments, not real data points. I also thought we had crossed the line at some point, and that was 6+ months ago. Since then the Big 4 have been getting large contracts, which isn't exactly a sign of a hollow middle.

I'm sure we'll see in a couple years who was right, but I only see this as a fractional bubble where pieces fail individually, not the whole system as one.