You think Apple would go through all this trouble if they didn't think they had a rock-solid case?

Yes. They have done so in the past and according to open ai they have lied with certain details. This article portrays Apple quite differently

OpenAI hits back at Apple over ‘oddly personal’ trade secrets fight - https://www.ft.com/content/7da4af42-178d-431a-91db-7e82eecc9... via @FT

	▲	Hugsbox 3 hours ago \| parent [-]
		I may be ignorant on the matter, maybe they've done that kind of thing before. >according to OpenAI The most juvenile "press release" I've ever seen a company post on purpose isn't the strongest evidence against them, though. Forgive me if I take everything OpenAI say with an ocean's worth of salt.