They could have but again, why? Each of those companies already have bigger hardware and software platforms and none of them are really behind Oculus in comput

They could have but again, why? Each of those companies already have bigger hardware and software platforms and none of them are really behind Oculus in computer vision, so what would Oculus give those other companies? Google (with Lenovo and the Mirage Solo) and Microsoft (with Hololens) had stand alone headsets before the Quest.