Right now it seems we are heading for the CHOAM company. (Fictional company in the Dune 'verse that does everything.) I've joked that Amazon is CHOAM and SpaceX is Weyland-Yutani (from Alien).
There do seem to be consolidation / de-consolidation cycles in business though. In the 1980s people also talked about the birth of EverythingCorps. You can see it a lot in 80s sci-fi. In the 90s you had the opposite trend.
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.
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.
There do seem to be consolidation / de-consolidation cycles in business though. In the 1980s people also talked about the birth of EverythingCorps. You can see it a lot in 80s sci-fi. In the 90s you had the opposite trend.