We're finding out the cost, now, of the extreme centralization of these platforms, especially caused by their device-locked app stores. Doubling down on the idea because people "seem fine with" it is a bad idea, especially now that we have hindsight. It's no mistake that the big innovation of the era, cryptocurrency, is happening largely outside of all the platforms you listed.

Also, I know that you can run SteamVR apps - I develop a VR game with hundreds of thousands of dollars in sales on Steam, but I've been locked out of the Oculus store for...unknown reasons? Someone behind the black box must've made a decision to block it.