Adam Neumann led WeWork through its spectacular rise and fall.Jackal Pan/Visual China Group via Getty Images WeWork's rise and fall offers a stark warning for the AI era. The company claimed on Tuesday that "substantial doubt exists" about its future ability to operate. Companies racing for glory in the AI era would do well to learn from the over-exuberance in the WeWork saga. WeWork and artificial intelligence do not, on the face it, have very much in common.The office-sharing company has shown its true colors as a glorified commercial landlord, despite years of claims by its private investors that it could be a $100 billion business that spans tech, interior decor, and construction.