You know as well as I do that no company will ever do that. The result will be that there will be no new platforms that aren't either fully locked down or built by and for FOSS enthusiasts.

Heck, just look at WordPress for an example of what happens when a company tries to create a purely open platform and then still be a for-profit company. You can have open platforms maintained out of altruism or closed platforms maintained for profit. Android was a middle path that has now been shown to be illegal.

Creating an open platform is a choice that restricts your allowable actions in the future in exchange for faster growth in the present.

You can still be a for profit company with an open platform without acting in an illegal manner.

You just won't be able to afford as large a hanger for your blimp in as small a number of years.

Google did not compete in an anticompetitive matter (w.r.t. app stores) and a federal judge determining that they did means nothing because it will likely be appealed by another judge. They will probably win their appeal because the verdict is insane.