Indeed. I find the Amazon as a monopoly argument very curious when they are smaller than Walmart as a retailer. Walmart is a similar percentage of the regular retail market in the USA.
The wave of consolidations that has been basically non-stop since the Reagan administration has left us with way too few competitors in way too many markets. We in tech are just particularly blind to it because of the platform duopoly that has seemed "natural" since the first major platform war between Microsoft and Apple in the '90s—there's this feeling that of course there will be a fight between a small number of competitors, and of course we'll end up with one company holding the lion's share of everything, partly due to network effects.
In a truly healthy, competitive economy, we wouldn't even be able to list the number of prominent online or brick & mortar retail companies in the "top tier" on both our hands.
