If you're stretching "market power" and "consumer substitution" this far it seems like a whole lot of fashion brands would be "monopolies". Tesla. The BMW/Merce

If you're stretching "market power" and "consumer substitution" this far it seems like a whole lot of fashion brands would be "monopolies". Tesla. The BMW/Mercedes/Audi luxury German auto bands in the US. Google Search. Macs. Thinkpads. There are SO MANY market sub-slices where some brands have pricing power over others. Where do you draw the "how often do people have to switch" line? Some of use have switched multiple times between Android and iOS in the last decade, after all.