They still exist and are regularly pumping out millionaires from their executive suites.
It's helpful to think about corporate America as a gigantic factory, but instead of a factory that makes gadgets or appliances, it's a factory that makes millionaires. On one end of the factory, the raw materials come in: Able-bodied workers, money from customers, and capital from investors. On the other end of the factory, the finished product--millionaire executives--fly out on golden parachutes into retirement. In the back, the waste from the manufacturing process gets discarded: The broken lives and bodies of all the rank-and-file workers, and all the negative societal and environmental externalities that were also destroyed in the process.
Profit for shareholders and [temporary, conditional] employment for workers are mere side effects of the process, and they'd do away with the second one if they had the technology to.