We seem to have both trends concurrently right now: institutional investors push for clean sector separation, when they expect sector A growing they want to be able to buy into companies in that sector with as little baggage in sector B as possible and vice versa. Consequently, "the old tech corporation" (Siemens, Philips, GE) seems to be in a permanent state of shrinkage by spinning out one field after another. At the same time, "new tech" corporations are still growing faster than any sector purity investor agitation could keep up with, some even still under the control of founders so that the entirely different logics of personal empire-building apply.

How about then Amazon becomes the state, viola (sic) state controlled production, give everyone an equal share and we have Communism!

You joke but this is sort of what Marx actually argued. Revolutionary state dictated communism was mostly Lenin. Marx thought capitalism would evolve into communism.