In more traditional industries investors seem to prefer less integration. One example being Siemens, who divested their Healthineers and Energy divisions and all their share values increased by a lot.
Maybe this is because these industries are better understood and there is less risk involved, but I wonder if the current big software companies will take similar paths in the future.
Investors often prefer stocks that are not themselves a portfolio (like AWS and Amazon retail being bundled; or your Siemens example). Lots of people would like to buy into AWS's margins without also buying Amazon retail's margins. But this is different from vertical integration that creates competitive advantage.
Maybe this is because these industries are better understood and there is less risk involved, but I wonder if the current big software companies will take similar paths in the future.