I don’t get it. OpenAI was dreaming of some billions from this partnership that didn’t happen. Assuming there is a contract with rights, obligations and respo

I don’t get it. OpenAI was dreaming of some billions from this partnership that didn’t happen. Assuming there is a contract with rights, obligations and responsibilities both parties signed, I can’t imagine a company like Apple exposing itself by not honoring their part. So sue for what? “We dreamt of more and it didn’t happen”?