> However, the legal question of having a monopoly on publishing for a game console has been settled ages ago, and the platform owners won.
I don't believe it has, and I don't believe they do.
The only lawsuit of this nature that I'm aware of is Atari v. Nintendo [1]. All that lawsuit established was that
- It isn't fair use to violate copyright law in the process of bypassing mechanisms used to maintain the monopoly
- While it might be copyright misuse to create those mechanisms establishing a monopoly in the first place (undecided), the court isn't going to grant you a win when you got in the position you did by lying to the government to steal code.
Notably (as far as I can tell) it established nothing whatsoever about antitrust law, which is what is at issue in this case and presumably what would be at issue in a similar case related to consoles.
Is there another case you are thinking of?
[1] https://en.wikipedia.org/wiki/Atari_Games_Corp._v._Nintendo_....