Earlier quoted context omitted.
The Brown Shoe Company merger in the 1960s was shot down, even though it would only control around 7% of the nation’s shoe supply. It’s important to not just consider the quantitative impact of the monopolist (percent of market share) but also the qualitative components (is it vertically integrated? is it hurting consumers?). I’m not sure whether or not Apple is a monopolist, but I certainly think there are some argu…
US Antitrust law generally is about pricing, collusion (over pricing or market access), and competition more so than just monopoly power. It is straight up not illegal to be a monopoly, only to abuse the position. I'm surprised there haven't been more attempts at a "tying" argument against Apple's App Store and their platforms, but I'm also not a lawyer. It has what looks like a pretty clear, long history of being co…
Epic tried to make this argument in court and failed, mostly because tying is generally not illegal if the consumer is aware of the tie when purchasing and has the option to purchase an alternative product without such a tie.
In other words it would be absolutely legal for Brother to sell a printer that only uses Brother-branded paper and toner, because if you don't like those restrictions you can simply go and purchase a non-Brother printer instead.