> Imagine if Sony did this on Playstation. a) prohibiting the installation of non-PlayStation games and b) insisting that all purchases done via their store give them a 30% cut.
Many platforms are like this -- and many also have the majority marketshare. Is this a call to redefine what platforms can and cannot control?
For PlayStation you pay the Sony tax for the convenience of integrating with their payment services, not because they'll ban you for using anything else.
It's also a super different situation in general; for example, Sony actually often pays developers to develop for their store (e.g. PubFund [1]), and does free marketing campaigns for them. Console makers live and die by their access to a pipeline of new exclusive games, so they treat game developers well; Apple doesn't, so it squeezes app developers for what it can. Hence why game developers are suing Apple but not Sony.
Nintendo has had a clear monopoly on handheld consoles for several generations.
Sony had an extremely strong market position in the 5th and 6th generation gaming consoles but I wouldn't really call it a monopoly.