> Does 20.1 percent market share constitute a monopoly?
Depends how it's used. Wabash v. Illinois set the precedent that a far-minority can be a monopoly if they block a government-designated common carrier. Europe's DMA doesn't even mention monopolies at all, and instead sets a new compliance bar for large tech-related companies. Japan's legislation is headed in the same direction.
Seems entirely feasible to me that the App Store or Safari policies could be seen as obstruction of a common service. Apple's de-facto tax hasn't been explicitly blocked in the US yet, but it also has never been explicitly sanctioned. Without guidelines like the DMA in place, Apple is flying blind against US regulators. Microsoft got trapped deep in that hall of mirrors, and nearly paid the ultimate price.
> Is that not what the free market does?
The free market is supplanted by a government that ensures that only a non-lethal portion of rat feces is processed into your container of SPAM or McDonalds meal. They prevent you from exposure to what businesses call, "profit maximization".
If you have a good government, they treat you a little better. They punish the companies that violate consumer rights and scrutinize anticompetitive behavior when it shows up. The free market chooses between regulated competitors; if you think that's unfair, you can move to a country without the rat-feces regulators and see how your breakfast tastes over there. Then we can all be happy.
> When companies make poor choices customers punish them. (Budweiser 2023)
Your evidence is proof to the contrary of your claim. Budweiser wasn't "punished" for making an anticompetitive move, they were boycott because insecure Budweiser customers had a slow news cycle. If Apple had customers protesting for the same reasons, they'd never even know.
"Poor choices" notwithstanding, Apple customers couldn't be assed if they were angry. Suicide nets go up at Foxconn and the harshest words HN or MacRumors can muster is 'poor choice of manufacturing partner'. Conscientious startups and their Macbooks, nary separated any easier than protesting trailer parks and Budweiser.