Interesting, can this be an expected outcome of AI adoption? Mergers of big competitors?
Free competitive markets are not an emergent natural phenomenon, they are a technology of civilised societies, and without governments constantly keeping markets free, we keep reverting back to to robber barons and eventually petty warlord kings, that's the natural low-energy state of humans if you let it go unchecked.
Centuries, really, with only periodic exceptions.
The real comical part is we have almost been in the "late stage" as long as the time between Adam Smith's Wealth of Nations and the generation of this stupid idea.