You're taking a pretty narrow view of what a monopoly is with your anecdote. A monopoly is where a company gets large enough that it is able to leverage its ma

You're taking a pretty narrow view of what a monopoly is with your anecdote. A monopoly is where a company gets large enough that it is able to leverage its market share in anticompetetive ways (charging outrageously high prices, far above the competition, for exampe). NOT where its literally impossible to buy other brands or where a company has 100% market share. That scenario is impossible and will never happen in any market.